72990722 has 16 divisors (see below), whose sum is σ = 125254080. Its totient is φ = 31249968.

The previous prime is 72990721. The next prime is 72990727. The reversal of 72990722 is 22709927.

It is not an unprimeable number, because it can be changed into a prime (72990721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16304 + ... + 20292.

It is an arithmetic number, because the mean of its divisors is an integer number (7828380).

Almost surely, 2^72990722 is an apocalyptic number.

72990722 is a deficient number, since it is larger than the sum of its proper divisors (52263358).

72990722 is a wasteful number, since it uses less digits than its factorization.

72990722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5305.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 72990722 is about 8543.4607741828. The cubic root of 72990722 is about 417.9162129934.

The spelling of 72990722 in words is "seventy-two million, nine hundred ninety thousand, seven hundred twenty-two".