128856144 has 40 divisors (see below), whose sum is σ = 339165792. Its totient is φ = 42140800.

The previous prime is 128856139. The next prime is 128856151. The reversal of 128856144 is 441658821.

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, 22782 + ... + 27869.

Almost surely, 2^128856144 is an apocalyptic number.

It is an amenable number.

128856144 is an abundant number, since it is smaller than the sum of its proper divisors (210309648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128856144 is a wasteful number, since it uses less digits than its factorization.

128856144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50715 (or 50709 counting only the distinct ones).

The product of its digits is 61440, while the sum is 39.

The square root of 128856144 is about 11351.4820177808. The cubic root of 128856144 is about 505.0895426621.

The spelling of 128856144 in words is "one hundred twenty-eight million, eight hundred fifty-six thousand, one hundred forty-four".