68390972 has 12 divisors (see below), whose sum is σ = 128890776. Its totient is φ = 31565040.

The previous prime is 68390957. The next prime is 68390989. The reversal of 68390972 is 27909386.

It is a super-2 number, since 2×68390972² = 9354650102209568, 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 3 ways as a sum of consecutive naturals, for example, 657554 + ... + 657657.

It is an arithmetic number, because the mean of its divisors is an integer number (10740898).

Almost surely, 2^68390972 is an apocalyptic number.

It is an amenable number.

68390972 is a deficient number, since it is larger than the sum of its proper divisors (60499804).

68390972 is a wasteful number, since it uses less digits than its factorization.

68390972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315228 (or 1315226 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 68390972 is about 8269.8834332776. The cubic root of 68390972 is about 408.9462769409.

The spelling of 68390972 in words is "sixty-eight million, three hundred ninety thousand, nine hundred seventy-two".