28508780888 has 32 divisors (see below), whose sum is σ = 64305523200. Its totient is φ = 11574993312.

The previous prime is 28508780851. The next prime is 28508780933. The reversal of 28508780888 is 88808780582.

It is a self number, because there is not a number n which added to its sum of digits gives 28508780888.

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, 13395920 + ... + 13398047.

It is an arithmetic number, because the mean of its divisors is an integer number (2009547600).

Almost surely, 2^28508780888 is an apocalyptic number.

28508780888 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28508780888 is an abundant number, since it is smaller than the sum of its proper divisors (35796742312).

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

28508780888 is a wasteful number, since it uses less digits than its factorization.

28508780888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26793999 (or 26793995 counting only the distinct ones).

The product of its (nonzero) digits is 18350080, while the sum is 62.

The spelling of 28508780888 in words is "twenty-eight billion, five hundred eight million, seven hundred eighty thousand, eight hundred eighty-eight".