72320772 has 24 divisors (see below), whose sum is σ = 168927136. Its totient is φ = 24081408.

The previous prime is 72320753. The next prime is 72320789. The reversal of 72320772 is 27702327.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11223 + ... + 16449.

Almost surely, 2^72320772 is an apocalyptic number.

It is an amenable number.

72320772 is an abundant number, since it is smaller than the sum of its proper divisors (96606364).

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

72320772 is a wasteful number, since it uses less digits than its factorization.

72320772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6387 (or 6385 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 30.

The square root of 72320772 is about 8504.1620398485. The cubic root of 72320772 is about 416.6336574028.

The spelling of 72320772 in words is "seventy-two million, three hundred twenty thousand, seven hundred seventy-two".