28431056 has 10 divisors (see below), whose sum is σ = 55085202. Its totient is φ = 14215520.

The previous prime is 28431031. The next prime is 28431071. The reversal of 28431056 is 65013482.

It can be written as a sum of positive squares in only one way, i.e., 28090000 + 341056 = 5300^2 + 584^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 888455 + ... + 888486.

Almost surely, 2^28431056 is an apocalyptic number.

It is an amenable number.

28431056 is a deficient number, since it is larger than the sum of its proper divisors (26654146).

28431056 is a wasteful number, since it uses less digits than its factorization.

28431056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776949 (or 1776943 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 28431056 is about 5332.0780189341. The cubic root of 28431056 is about 305.2092302593.

The spelling of 28431056 in words is "twenty-eight million, four hundred thirty-one thousand, fifty-six".