68940928 has 32 divisors (see below), whose sum is σ = 156965760. Its totient is φ = 29545728.

The previous prime is 68940889. The next prime is 68940943. The reversal of 68940928 is 82904986.

It is a tau number, because it is divible by the number of its divisors (32).

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, 37576 + ... + 39367.

It is an arithmetic number, because the mean of its divisors is an integer number (4905180).

Almost surely, 2^68940928 is an apocalyptic number.

It is an amenable number.

68940928 is an abundant number, since it is smaller than the sum of its proper divisors (88024832).

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

68940928 is an equidigital number, since it uses as much as digits as its factorization.

68940928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76964 (or 76952 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 68940928 is about 8303.0673850090. The cubic root of 68940928 is about 410.0395123530.

The spelling of 68940928 in words is "sixty-eight million, nine hundred forty thousand, nine hundred twenty-eight".