28662120520 has 32 divisors (see below), whose sum is σ = 70352478720. Its totient is φ = 10422589120.

The previous prime is 28662120491. The next prime is 28662120533. The reversal of 28662120520 is 2502126682.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32570152 + ... + 32571031.

It is an arithmetic number, because the mean of its divisors is an integer number (2198514960).

Almost surely, 2^28662120520 is an apocalyptic number.

28662120520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28662120520 is an abundant number, since it is smaller than the sum of its proper divisors (41690358200).

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

28662120520 is a wasteful number, since it uses less digits than its factorization.

28662120520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65141205 (or 65141201 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The spelling of 28662120520 in words is "twenty-eight billion, six hundred sixty-two million, one hundred twenty thousand, five hundred twenty".