28451860056 has 24 divisors (see below), whose sum is σ = 77057121180. Its totient is φ = 9483953328.

The previous prime is 28451860049. The next prime is 28451860091. The reversal of 28451860056 is 65006815482.

28451860056 is a `hidden beast` number, since 2 + 84 + 518 + 6 + 0 + 0 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28451859993 and 28451860020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 197582290 + ... + 197582433.

Almost surely, 2^28451860056 is an apocalyptic number.

It is an amenable number.

28451860056 is an abundant number, since it is smaller than the sum of its proper divisors (48605261124).

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

28451860056 is a wasteful number, since it uses less digits than its factorization.

28451860056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395164735 (or 395164728 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The spelling of 28451860056 in words is "twenty-eight billion, four hundred fifty-one million, eight hundred sixty thousand, fifty-six".