72315634 has 32 divisors (see below), whose sum is σ = 120516480. Its totient is φ = 32389632.

The previous prime is 72315619. The next prime is 72315641. The reversal of 72315634 is 43651327.

It is a junction number, because it is equal to n+sod(n) for n = 72315596 and 72315605.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84352 + ... + 85204.

It is an arithmetic number, because the mean of its divisors is an integer number (3766140).

Almost surely, 2^72315634 is an apocalyptic number.

72315634 is a deficient number, since it is larger than the sum of its proper divisors (48200846).

72315634 is a wasteful number, since it uses less digits than its factorization.

72315634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994.

The product of its digits is 15120, while the sum is 31.

The square root of 72315634 is about 8503.8599471064. The cubic root of 72315634 is about 416.6237906459.

The spelling of 72315634 in words is "seventy-two million, three hundred fifteen thousand, six hundred thirty-four".