128551828 has 24 divisors (see below), whose sum is σ = 230589632. Its totient is φ = 62688384.

The previous prime is 128551817. The next prime is 128551847. The reversal of 128551828 is 828155821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25276 + ... + 29932.

Almost surely, 2^128551828 is an apocalyptic number.

It is an amenable number.

128551828 is a deficient number, since it is larger than the sum of its proper divisors (102037804).

128551828 is a wasteful number, since it uses less digits than its factorization.

128551828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4831 (or 4829 counting only the distinct ones).

The product of its digits is 51200, while the sum is 40.

The square root of 128551828 is about 11338.0698533745. The cubic root of 128551828 is about 504.6916105567.

It can be divided in two parts, 12855 and 1828, that multiplied together give a triangular number (23498940 = T₆₈₅₅).

The spelling of 128551828 in words is "one hundred twenty-eight million, five hundred fifty-one thousand, eight hundred twenty-eight".