57275540 has 48 divisors (see below), whose sum is σ = 137894400. Its totient is φ = 19575552.

The previous prime is 57275531. The next prime is 57275549. The reversal of 57275540 is 4557275.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (57275531) and next prime (57275549).

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 57275540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57275549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79301 + ... + 80019.

It is an arithmetic number, because the mean of its divisors is an integer number (2872800).

Almost surely, 2^57275540 is an apocalyptic number.

It is an amenable number.

57275540 is an abundant number, since it is smaller than the sum of its proper divisors (80618860).

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

57275540 is a wasteful number, since it uses less digits than its factorization.

57275540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304 (or 1302 counting only the distinct ones).

The product of its (nonzero) digits is 49000, while the sum is 35.

The square root of 57275540 is about 7568.0605177284. The cubic root of 57275540 is about 385.4692428819.

The spelling of 57275540 in words is "fifty-seven million, two hundred seventy-five thousand, five hundred forty".