68931128 has 16 divisors (see below), whose sum is σ = 147709680. Its totient is φ = 29541888.

The previous prime is 68931113. The next prime is 68931143. The reversal of 68931128 is 82113986.

It is an interprime number because it is at equal distance from previous prime (68931113) and next prime (68931143).

It is a junction number, because it is equal to n+sod(n) for n = 68931091 and 68931100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 615401 + ... + 615512.

It is an arithmetic number, because the mean of its divisors is an integer number (9231855).

Almost surely, 2^68931128 is an apocalyptic number.

It is an amenable number.

68931128 is an abundant number, since it is smaller than the sum of its proper divisors (78778552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68931128 is a wasteful number, since it uses less digits than its factorization.

68931128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230926 (or 1230922 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 68931128 is about 8302.4772206854. The cubic root of 68931128 is about 410.0200823001.

The spelling of 68931128 in words is "sixty-eight million, nine hundred thirty-one thousand, one hundred twenty-eight".