<PAGE>
FILE NO. 333-59997
RULE 424(B)(3)
PROSPECTUS SUPPLEMENT
(TO PROSPECTUS DATED JULY 30, 1998 AND PROSPECTUS SUPPLEMENT DATED FEBRUARY 17,
1999)
PROSPECTUS NUMBER: 1862
MERRILL LYNCH & CO., INC.
MEDIUM-TERM NOTES, SERIES B
DUE NINE MONTHS OR MORE FROM DATE OF ISSUE
FIXED RATE NOTES
<TABLE>
<CAPTION>
<S> <C>
PRINCIPAL AMOUNT: $160,000,000
CUSIP NUMBER: 59081S2R4
INTEREST RATE: 6.07000%
ORIGINAL ISSUE DATE: April 6, 1999
STATED MATURITY DATE: April 6, 2004
INTEREST PAYMENT DATES: Each April 6 and October 6, commencing on October 6, 1999 through and including
the Stated Maturity Date, subject to 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: March 31, 1999
</TABLE>
