57156040 has 32 divisors (see below), whose sum is σ = 136167480. Its totient is φ = 21517312.

The previous prime is 57156037. The next prime is 57156049. The reversal of 57156040 is 4065175.

It can be written as a sum of positive squares in 4 ways, for example, as 50154724 + 7001316 = 7082^2 + 2646^2 .

It is not an unprimeable number, because it can be changed into a prime (57156049) 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, 41347 + ... + 42706.

Almost surely, 2^57156040 is an apocalyptic number.

It is an amenable number.

57156040 is an abundant number, since it is smaller than the sum of its proper divisors (79011440).

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

57156040 is a wasteful number, since it uses less digits than its factorization.

57156040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84081 (or 84077 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 57156040 is about 7560.1613739391. The cubic root of 57156040 is about 385.2009745107.

The spelling of 57156040 in words is "fifty-seven million, one hundred fifty-six thousand, forty".