28056854988 has 18 divisors (see below), whose sum is σ = 70921494644. Its totient is φ = 9352284984.

The previous prime is 28056854983. The next prime is 28056854989. The reversal of 28056854988 is 88945865082.

28056854988 is a `hidden beast` number, since 2 + 8 + 0 + 5 + 6 + 8 + 549 + 88 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×28056854988² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28056854983) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 389678506 + ... + 389678577.

Almost surely, 2^28056854988 is an apocalyptic number.

It is an amenable number.

28056854988 is an abundant number, since it is smaller than the sum of its proper divisors (42864639656).

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

28056854988 is a wasteful number, since it uses less digits than its factorization.

28056854988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779357093 (or 779357088 counting only the distinct ones).

The product of its (nonzero) digits is 44236800, while the sum is 63.

The spelling of 28056854988 in words is "twenty-eight billion, fifty-six million, eight hundred fifty-four thousand, nine hundred eighty-eight".