57163940 has 24 divisors (see below), whose sum is σ = 120226680. Its totient is φ = 22830848.

The previous prime is 57163921. The next prime is 57163949. The reversal of 57163940 is 4936175.

It can be written as a sum of positive squares in 4 ways, for example, as 24285184 + 32878756 = 4928^2 + 5734^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 57163940.

It is not an unprimeable number, because it can be changed into a prime (57163949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14414 + ... + 17946.

It is an arithmetic number, because the mean of its divisors is an integer number (5009445).

Almost surely, 2^57163940 is an apocalyptic number.

It is an amenable number.

57163940 is an abundant number, since it is smaller than the sum of its proper divisors (63062740).

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

57163940 is a wasteful number, since it uses less digits than its factorization.

57163940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4351 (or 4349 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 57163940 is about 7560.6838315062. The cubic root of 57163940 is about 385.2187209438.

The spelling of 57163940 in words is "fifty-seven million, one hundred sixty-three thousand, nine hundred forty".