72299664 has 30 divisors (see below), whose sum is σ = 202339046. Its totient is φ = 24099840.

The previous prime is 72299663. The next prime is 72299671. The reversal of 72299664 is 46699227.

It can be written as a sum of positive squares in only one way, i.e., 67371264 + 4928400 = 8208^2 + 2220^2 .

It is not an unprimeable number, because it can be changed into a prime (72299663) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 250897 + ... + 251184.

Almost surely, 2^72299664 is an apocalyptic number.

It is an amenable number.

72299664 is an abundant number, since it is smaller than the sum of its proper divisors (130039382).

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

72299664 is a wasteful number, since it uses less digits than its factorization.

72299664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502095 (or 502086 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 72299664 is about 8502.9209098991. The cubic root of 72299664 is about 416.5931196766.

The spelling of 72299664 in words is "seventy-two million, two hundred ninety-nine thousand, six hundred sixty-four".