28808775632 has 60 divisors (see below), whose sum is σ = 69075355680. Its totient is φ = 11396870784.

The previous prime is 28808775617. The next prime is 28808775727. The reversal of 28808775632 is 23657780882.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 742082 + ... + 779937.

It is an arithmetic number, because the mean of its divisors is an integer number (1151255928).

Almost surely, 2^28808775632 is an apocalyptic number.

It is an amenable number.

28808775632 is an abundant number, since it is smaller than the sum of its proper divisors (40266580048).

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

28808775632 is a wasteful number, since it uses less digits than its factorization.

28808775632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522060 (or 1522041 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 28808775632 in words is "twenty-eight billion, eight hundred eight million, seven hundred seventy-five thousand, six hundred thirty-two".