68631872 has 14 divisors (see below), whose sum is σ = 136191498. Its totient is φ = 34315904.

The previous prime is 68631859. The next prime is 68631881. The reversal of 68631872 is 27813686.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 66846976 + 1784896 = 8176^2 + 1336^2 .

It is a congruent number.

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 as a sum of consecutive naturals, namely, 536123 + ... + 536250.

Almost surely, 2^68631872 is an apocalyptic number.

It is an amenable number.

68631872 is a deficient number, since it is larger than the sum of its proper divisors (67559626).

68631872 is a wasteful number, since it uses less digits than its factorization.

68631872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072385 (or 1072375 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 68631872 is about 8284.4355269385. The cubic root of 68631872 is about 409.4258710125.

The spelling of 68631872 in words is "sixty-eight million, six hundred thirty-one thousand, eight hundred seventy-two".