57992721 has 16 divisors (see below), whose sum is σ = 81192000. Its totient is φ = 36767808.

The previous prime is 57992713. The next prime is 57992741. The reversal of 57992721 is 12729975.

57992721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 57992721 - 2³ = 57992713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57992741) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 855 + ... + 10803.

It is an arithmetic number, because the mean of its divisors is an integer number (5074500).

Almost surely, 2^57992721 is an apocalyptic number.

It is an amenable number.

57992721 is a deficient number, since it is larger than the sum of its proper divisors (23199279).

57992721 is a wasteful number, since it uses less digits than its factorization.

57992721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10048.

The product of its digits is 79380, while the sum is 42.

The square root of 57992721 is about 7615.2952011068. The cubic root of 57992721 is about 387.0714702180.

The spelling of 57992721 in words is "fifty-seven million, nine hundred ninety-two thousand, seven hundred twenty-one".