72179690 has 32 divisors (see below), whose sum is σ = 142845120. Its totient is φ = 26041600.

The previous prime is 72179669. The next prime is 72179707. The reversal of 72179690 is 9697127.

It is a happy number.

It is a super-2 number, since 2×72179690² = 10419815296992200, which contains 22 as substring.

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, 11906 + ... + 16914.

It is an arithmetic number, because the mean of its divisors is an integer number (4463910).

Almost surely, 2^72179690 is an apocalyptic number.

72179690 is a deficient number, since it is larger than the sum of its proper divisors (70665430).

72179690 is a wasteful number, since it uses less digits than its factorization.

72179690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5158.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 72179690 is about 8495.8631109499. The cubic root of 72179690 is about 416.3625606787.

The spelling of 72179690 in words is "seventy-two million, one hundred seventy-nine thousand, six hundred ninety".