68331144 has 64 divisors (see below), whose sum is σ = 205516800. Its totient is φ = 18494784.

The previous prime is 68331113. The next prime is 68331157. The reversal of 68331144 is 44113386.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7512 + ... + 13895.

It is an arithmetic number, because the mean of its divisors is an integer number (3211200).

Almost surely, 2^68331144 is an apocalyptic number.

It is an amenable number.

68331144 is an abundant number, since it is smaller than the sum of its proper divisors (137185656).

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

68331144 is a wasteful number, since it uses less digits than its factorization.

68331144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21442 (or 21438 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 68331144 is about 8266.2654203697. The cubic root of 68331144 is about 408.8269942589.

The spelling of 68331144 in words is "sixty-eight million, three hundred thirty-one thousand, one hundred forty-four".