72973120 has 56 divisors (see below), whose sum is σ = 189573408. Its totient is φ = 26534400.

The previous prime is 72973097. The next prime is 72973151. The reversal of 72973120 is 2137927.

It is a congruent number.

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, 6846 + ... + 13885.

Almost surely, 2^72973120 is an apocalyptic number.

It is an amenable number.

72973120 is an abundant number, since it is smaller than the sum of its proper divisors (116600288).

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

72973120 is a wasteful number, since it uses less digits than its factorization.

72973120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20759 (or 20749 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 72973120 is about 8542.4305674673. The cubic root of 72973120 is about 417.8826162458.

The spelling of 72973120 in words is "seventy-two million, nine hundred seventy-three thousand, one hundred twenty".