57166840 has 32 divisors (see below), whose sum is σ = 129458880. Its totient is φ = 22718592.

The previous prime is 57166789. The next prime is 57166847. The reversal of 57166840 is 4866175.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 57166840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57166847) 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, 1729 + ... + 10831.

It is an arithmetic number, because the mean of its divisors is an integer number (4045590).

Almost surely, 2^57166840 is an apocalyptic number.

It is an amenable number.

57166840 is an abundant number, since it is smaller than the sum of its proper divisors (72292040).

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

57166840 is a wasteful number, since it uses less digits than its factorization.

57166840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9271 (or 9267 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 57166840 is about 7560.8756106684. The cubic root of 57166840 is about 385.2252350469.

The spelling of 57166840 in words is "fifty-seven million, one hundred sixty-six thousand, eight hundred forty".