57163920 has 160 divisors (see below), whose sum is σ = 197130240. Its totient is φ = 13585920.

The previous prime is 57163903. The next prime is 57163921. The reversal of 57163920 is 2936175.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57163921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155577 + ... + 155943.

It is an arithmetic number, because the mean of its divisors is an integer number (1232064).

Almost surely, 2^57163920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57163920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98565120).

57163920 is an abundant number, since it is smaller than the sum of its proper divisors (139966320).

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

57163920 is a wasteful number, since it uses less digits than its factorization.

57163920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 57163920 is about 7560.6825088744. The cubic root of 57163920 is about 385.2186760181.

The spelling of 57163920 in words is "fifty-seven million, one hundred sixty-three thousand, nine hundred twenty".