72931394 has 16 divisors (see below), whose sum is σ = 116028288. Its totient is φ = 34262592.

The previous prime is 72931387. The next prime is 72931399. The reversal of 72931394 is 49313927.

It is not an unprimeable number, because it can be changed into a prime (72931399) 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, 23819 + ... + 26705.

It is an arithmetic number, because the mean of its divisors is an integer number (7251768).

Almost surely, 2^72931394 is an apocalyptic number.

72931394 is a deficient number, since it is larger than the sum of its proper divisors (43096894).

72931394 is a wasteful number, since it uses less digits than its factorization.

72931394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3649.

The product of its digits is 40824, while the sum is 38.

The square root of 72931394 is about 8539.9879391016. The cubic root of 72931394 is about 417.8029526907.

It can be divided in two parts, 729 and 31394, that added together give a palindrome (32123).

The spelling of 72931394 in words is "seventy-two million, nine hundred thirty-one thousand, three hundred ninety-four".