28940133924 has 135 divisors (see below), whose sum is σ = 82035364257. Its totient is φ = 8892408096.

The previous prime is 28940133913. The next prime is 28940133941. The reversal of 28940133924 is 42933104982.

The square root of 28940133924 is 170118.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4281084900 + 24659049024 = 65430^2 + 157032^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28940133924.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 39807249 + ... + 39807975.

Almost surely, 2^28940133924 is an apocalyptic number.

28940133924 is the 170118-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28940133924

28940133924 is an abundant number, since it is smaller than the sum of its proper divisors (53095230333).

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

28940133924 is an equidigital number, since it uses as much as digits as its factorization.

28940133924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1496 (or 745 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 28940133924 in words is "twenty-eight billion, nine hundred forty million, one hundred thirty-three thousand, nine hundred twenty-four".