28331212800 has 456 divisors, whose sum is σ = 102978355392. Its totient is φ = 6815744000.

The previous prime is 28331212769. The next prime is 28331212807. The reversal of 28331212800 is 821213382.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (28331212807) 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, 216268735 + ... + 216268865.

Almost surely, 2^28331212800 is an apocalyptic number.

28331212800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28331212800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51489177696).

28331212800 is an abundant number, since it is smaller than the sum of its proper divisors (74647142592).

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

28331212800 is an equidigital number, since it uses as much as digits as its factorization.

28331212800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The spelling of 28331212800 in words is "twenty-eight billion, three hundred thirty-one million, two hundred twelve thousand, eight hundred".