72299392 has 32 divisors (see below), whose sum is σ = 157131000. Its totient is φ = 32862720.

The previous prime is 72299387. The next prime is 72299393. The reversal of 72299392 is 29399227.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72299393) 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 3 ways as a sum of consecutive naturals, for example, 24267 + ... + 27082.

Almost surely, 2^72299392 is an apocalyptic number.

It is an amenable number.

72299392 is an abundant number, since it is smaller than the sum of its proper divisors (84831608).

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

72299392 is a wasteful number, since it uses less digits than its factorization.

72299392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51374 (or 51362 counting only the distinct ones).

The product of its digits is 122472, while the sum is 43.

The square root of 72299392 is about 8502.9049153804. The cubic root of 72299392 is about 416.5925972515.

The spelling of 72299392 in words is "seventy-two million, two hundred ninety-nine thousand, three hundred ninety-two".