28311297800 has 48 divisors (see below), whose sum is σ = 65944358160. Its totient is φ = 11303772480.

The previous prime is 28311297799. The next prime is 28311297809. The reversal of 28311297800 is 879211382.

It is not an unprimeable number, because it can be changed into a prime (28311297809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19994 + ... + 238793.

It is an arithmetic number, because the mean of its divisors is an integer number (1373840795).

Almost surely, 2^28311297800 is an apocalyptic number.

28311297800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28311297800 is an abundant number, since it is smaller than the sum of its proper divisors (37633060360).

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

28311297800 is a wasteful number, since it uses less digits than its factorization.

28311297800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259350 (or 259341 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The spelling of 28311297800 in words is "twenty-eight billion, three hundred eleven million, two hundred ninety-seven thousand, eight hundred".