57275640 has 128 divisors (see below), whose sum is σ = 192628800. Its totient is φ = 15137280.

The previous prime is 57275627. The next prime is 57275653. The reversal of 57275640 is 4657275.

57275640 is a `hidden beast` number, since 5 + 7 + 2 + 7 + 5 + 640 = 666.

It is an interprime number because it is at equal distance from previous prime (57275627) and next prime (57275653).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 57275595 and 57275604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 195334 + ... + 195626.

Almost surely, 2^57275640 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 57275640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96314400).

57275640 is an abundant number, since it is smaller than the sum of its proper divisors (135353160).

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

57275640 is a wasteful number, since it uses less digits than its factorization.

57275640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494 (or 484 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 36.

The square root of 57275640 is about 7568.0671244380. The cubic root of 57275640 is about 385.4694672180.

The spelling of 57275640 in words is "fifty-seven million, two hundred seventy-five thousand, six hundred forty".