57020406 has 16 divisors (see below), whose sum is σ = 120043200. Its totient is φ = 18006408.

The previous prime is 57020399. The next prime is 57020413. The reversal of 57020406 is 60402075.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (57020399) and next prime (57020413).

It is a Curzon number.

It is a congruent number.

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, 249976 + ... + 250203.

It is an arithmetic number, because the mean of its divisors is an integer number (7502700).

Almost surely, 2^57020406 is an apocalyptic number.

57020406 is an abundant number, since it is smaller than the sum of its proper divisors (63022794).

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

57020406 is a wasteful number, since it uses less digits than its factorization.

57020406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500203.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 57020406 is about 7551.1857347042. The cubic root of 57020406 is about 384.8960330952.

The spelling of 57020406 in words is "fifty-seven million, twenty thousand, four hundred six".