28875116020 has 24 divisors (see below), whose sum is σ = 60853548168. Its totient is φ = 11508940800.

The previous prime is 28875115999. The next prime is 28875116047. The reversal of 28875116020 is 2061157882.

It can be written as a sum of positive squares in 4 ways, for example, as 1980428004 + 26894688016 = 44502^2 + 163996^2 .

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, 2563341 + ... + 2574580.

It is an arithmetic number, because the mean of its divisors is an integer number (2535564507).

Almost surely, 2^28875116020 is an apocalyptic number.

28875116020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28875116020 is an abundant number, since it is smaller than the sum of its proper divisors (31978432148).

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

28875116020 is a wasteful number, since it uses less digits than its factorization.

28875116020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5138211 (or 5138209 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The spelling of 28875116020 in words is "twenty-eight billion, eight hundred seventy-five million, one hundred sixteen thousand, twenty".