72979520 has 28 divisors (see below), whose sum is σ = 173783244. Its totient is φ = 29191680.

The previous prime is 72979507. The next prime is 72979541. The reversal of 72979520 is 2597927.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 46022656 + 26956864 = 6784^2 + 5192^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113711 + ... + 114350.

Almost surely, 2^72979520 is an apocalyptic number.

It is an amenable number.

72979520 is an abundant number, since it is smaller than the sum of its proper divisors (100803724).

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

72979520 is a wasteful number, since it uses less digits than its factorization.

72979520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228078 (or 228068 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 72979520 is about 8542.8051598992. The cubic root of 72979520 is about 417.8948324818.

The spelling of 72979520 in words is "seventy-two million, nine hundred seventy-nine thousand, five hundred twenty".