28500639800 has 24 divisors (see below), whose sum is σ = 66263988000. Its totient is φ = 11400255840.

The previous prime is 28500639781. The next prime is 28500639841. The reversal of 28500639800 is 893600582.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 71251400 + ... + 71251799.

It is an arithmetic number, because the mean of its divisors is an integer number (2760999500).

Almost surely, 2^28500639800 is an apocalyptic number.

28500639800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28500639800 is an abundant number, since it is smaller than the sum of its proper divisors (37763348200).

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

28500639800 is a wasteful number, since it uses less digits than its factorization.

28500639800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142503215 (or 142503206 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 28500639800 in words is "twenty-eight billion, five hundred million, six hundred thirty-nine thousand, eight hundred".