28521960 has 32 divisors (see below), whose sum is σ = 85566240. Its totient is φ = 7605824.

The previous prime is 28521959. The next prime is 28521973. The reversal of 28521960 is 6912582.

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, 118722 + ... + 118961.

It is an arithmetic number, because the mean of its divisors is an integer number (2673945).

Almost surely, 2^28521960 is an apocalyptic number.

28521960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28521960 is an abundant number, since it is smaller than the sum of its proper divisors (57044280).

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

28521960 is a wasteful number, since it uses less digits than its factorization.

28521960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237697 (or 237693 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 28521960 is about 5340.5954724169. The cubic root of 28521960 is about 305.5341709674.

The spelling of 28521960 in words is "twenty-eight million, five hundred twenty-one thousand, nine hundred sixty".