<PAGE>
<TABLE>
<CAPTION>
<S> <C>
PROSPECTUS SUPPLEMENT FILE NO. 333-44173
(TO PROSPECTUS DATED JANUARY 29, 1998 AND PROSPECTUS SUPPLEMENT DATED RULE 424(B)(3)
MARCH 12, 1998)
PROSPECTUS NUMBER: 1737
</TABLE>
MERRILL LYNCH & CO., INC.
MEDIUM-TERM NOTES, SERIES B
DUE NINE MONTHS OR MORE FROM DATE OF ISSUE
FLOATING RATE NOTES
<TABLE>
<CAPTION>
<S> <C> <C> <C>
PRINCIPAL AMOUNT: $100,000,000 ORIGINAL ISSUE DATE: June 30, 1998
CUSIP NUMBER: 59018S L51 STATED MATURITY DATE: June 30, 1999
INTEREST CALCULATION: DAY COUNT CONVENTION:
/x/ REGULAR FLOATING RATE NOTE /x/ ACTUAL/360
/ / INVERSE FLOATING RATE NOTE / / 30/360
(FIXED INTEREST RATE): / / ACTUAL/ACTUAL
INTEREST RATE BASIS:
/x/ LIBOR / / COMMERCIAL PAPER RATE
/ / CMT RATE / / ELEVENTH DISTRICT COST OF FUNDS RATE
/ / PRIME RATE / / CD RATE
/ / FEDERAL FUNDS RATE / / OTHER (SEE ATTACHED)
/ / TREASURY RATE
DESIGNATED CMT PAGE: DESIGNATED LIBOR PAGE:
CMT TELERATE PAGE: LIBOR TELERATE PAGE:
CMT REUTERS PAGE: LIBOR REUTERS PAGE:
INDEX MATURITY: Quarterly MINIMUM INTEREST RATE: Not Applicable
SPREAD: -0.035 basis points MAXIMUM INTEREST RATE: Not Applicable
INITIAL INTEREST RATE: 5.65250% SPREAD MULTIPLIER: Not Applicable
OPTIONAL "FLIP" COUPON: On December 30, 1998 ML & Co. may exercise a one time right to convert in whole, but
not in part, the entire principal amount of the Notes to regular Fixed Rate Notes at a
rate of 5.79% per annum calculated on an Actual/360 basis and payable upon maturity
with 30 days prior notice.
INTEREST RESET DATES: Quarterly commencing June 30, 1998, through the Maturity Date; subject to
modified following business day convention.
INTEREST PAYMENT DATES: Quarterly on the 30th of September, December, March, and Maturity, subject to modified
following business day convention.
REPAYMENT AT THE
OPTION OF THE HOLDER: The Notes cannot be repaid prior to the Stated Maturity Date.
REDEMPTION AT THE
OPTION OF THE COMPANY: The Notes cannot be redeemed prior to the Stated Maturity Date.
FORM: The Notes are being issued in fully registered book-entry form.
TRUSTEE: The Chase Manhattan Bank
DATED: June 25, 1998
</TABLE>
