72331740 has 72 divisors (see below), whose sum is σ = 236291328. Its totient is φ = 17804160.

The previous prime is 72331723. The next prime is 72331769. The reversal of 72331740 is 4713327.

It is a super-2 number, since 2×72331740² = 10463761222855200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13116 + ... + 17795.

It is an arithmetic number, because the mean of its divisors is an integer number (3281824).

Almost surely, 2^72331740 is an apocalyptic number.

It is an amenable number.

72331740 is an abundant number, since it is smaller than the sum of its proper divisors (163959588).

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

72331740 is a wasteful number, since it uses less digits than its factorization.

72331740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30939 (or 30934 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 72331740 is about 8504.8068761142. The cubic root of 72331740 is about 416.6547182351.

The spelling of 72331740 in words is "seventy-two million, three hundred thirty-one thousand, seven hundred forty".