68440520 has 32 divisors (see below), whose sum is σ = 157576320. Its totient is φ = 26738880.

The previous prime is 68440511. The next prime is 68440549. The reversal of 68440520 is 2504486.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18176 + ... + 21615.

It is an arithmetic number, because the mean of its divisors is an integer number (4924260).

Almost surely, 2^68440520 is an apocalyptic number.

It is an amenable number.

68440520 is an abundant number, since it is smaller than the sum of its proper divisors (89135800).

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

68440520 is a wasteful number, since it uses less digits than its factorization.

68440520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39845 (or 39841 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 68440520 is about 8272.8785800349. The cubic root of 68440520 is about 409.0450111170.

The spelling of 68440520 in words is "sixty-eight million, four hundred forty thousand, five hundred twenty".