68393872 has 20 divisors (see below), whose sum is σ = 133070476. Its totient is φ = 34053120.

The previous prime is 68393807. The next prime is 68393887. The reversal of 68393872 is 27839386.

It can be written as a sum of positive squares in 2 ways, for example, as 55890576 + 12503296 = 7476^2 + 3536^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5013 + ... + 12724.

Almost surely, 2^68393872 is an apocalyptic number.

It is an amenable number.

68393872 is a deficient number, since it is larger than the sum of its proper divisors (64676604).

68393872 is a wasteful number, since it uses less digits than its factorization.

68393872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17986 (or 17980 counting only the distinct ones).

The product of its digits is 435456, while the sum is 46.

The square root of 68393872 is about 8270.0587664176. The cubic root of 68393872 is about 408.9520570773.

The spelling of 68393872 in words is "sixty-eight million, three hundred ninety-three thousand, eight hundred seventy-two".