28931031600 has 120 divisors (see below), whose sum is σ = 92713589760. Its totient is φ = 7711791360.

The previous prime is 28931031599. The next prime is 28931031607. The reversal of 28931031600 is 613013982.

It is a tau number, because it is divible by the number of its divisors (120).

It is not an unprimeable number, because it can be changed into a prime (28931031607) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5477761 + ... + 5483039.

It is an arithmetic number, because the mean of its divisors is an integer number (772613248).

Almost surely, 2^28931031600 is an apocalyptic number.

28931031600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28931031600 is an abundant number, since it is smaller than the sum of its proper divisors (63782558160).

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

28931031600 is a wasteful number, since it uses less digits than its factorization.

28931031600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9867 (or 9856 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The spelling of 28931031600 in words is "twenty-eight billion, nine hundred thirty-one million, thirty-one thousand, six hundred".