68639372 has 6 divisors (see below), whose sum is σ = 120118908. Its totient is φ = 34319684.

The previous prime is 68639369. The next prime is 68639393. The reversal of 68639372 is 27393686.

It is a super-2 number, since 2×68639372² = 9422726777108768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8579918 + ... + 8579925.

It is an arithmetic number, because the mean of its divisors is an integer number (20019818).

Almost surely, 2^68639372 is an apocalyptic number.

It is an amenable number.

68639372 is a deficient number, since it is larger than the sum of its proper divisors (51479536).

68639372 is a wasteful number, since it uses less digits than its factorization.

68639372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17159847 (or 17159845 counting only the distinct ones).

The product of its digits is 326592, while the sum is 44.

The square root of 68639372 is about 8284.8881706394. Note that the first 3 decimals coincide. The cubic root of 68639372 is about 409.4407843081.

The spelling of 68639372 in words is "sixty-eight million, six hundred thirty-nine thousand, three hundred seventy-two".