28886631520 has 48 divisors (see below), whose sum is σ = 68270601168. Its totient is φ = 11550261760.

The previous prime is 28886631509. The next prime is 28886631539. The reversal of 28886631520 is 2513668882.

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, 405627 + ... + 471493.

It is an arithmetic number, because the mean of its divisors is an integer number (1422304191).

Almost surely, 2^28886631520 is an apocalyptic number.

28886631520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28886631520 is an abundant number, since it is smaller than the sum of its proper divisors (39383969648).

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

28886631520 is a wasteful number, since it uses less digits than its factorization.

28886631520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68623 (or 68615 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 49.

The spelling of 28886631520 in words is "twenty-eight billion, eight hundred eighty-six million, six hundred thirty-one thousand, five hundred twenty".