28507572224 has 96 divisors (see below), whose sum is σ = 59655697920. Its totient is φ = 13602816000.

The previous prime is 28507572217. The next prime is 28507572283. The reversal of 28507572224 is 42227570582.

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, 4631549 + ... + 4637699.

It is an arithmetic number, because the mean of its divisors is an integer number (621413520).

Almost surely, 2^28507572224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28507572224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29827848960).

28507572224 is an abundant number, since it is smaller than the sum of its proper divisors (31148125696).

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

28507572224 is an equidigital number, since it uses as much as digits as its factorization.

28507572224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6277 (or 6257 counting only the distinct ones).

The product of its (nonzero) digits is 627200, while the sum is 44.

The spelling of 28507572224 in words is "twenty-eight billion, five hundred seven million, five hundred seventy-two thousand, two hundred twenty-four".