57663820 has 12 divisors (see below), whose sum is σ = 121094064. Its totient is φ = 23065520.

The previous prime is 57663791. The next prime is 57663821. The reversal of 57663820 is 2836675.

It is a super-2 number, since 2×57663820² = 6650232273984800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 57663820.

It is not an unprimeable number, because it can be changed into a prime (57663821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1441576 + ... + 1441615.

It is an arithmetic number, because the mean of its divisors is an integer number (10091172).

Almost surely, 2^57663820 is an apocalyptic number.

It is an amenable number.

57663820 is an abundant number, since it is smaller than the sum of its proper divisors (63430244).

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

57663820 is a wasteful number, since it uses less digits than its factorization.

57663820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2883200 (or 2883198 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 57663820 is about 7593.6697320861. The cubic root of 57663820 is about 386.3383343733.

The spelling of 57663820 in words is "fifty-seven million, six hundred sixty-three thousand, eight hundred twenty".