57032440 has 16 divisors (see below), whose sum is σ = 128323080. Its totient is φ = 22812960.

The previous prime is 57032431. The next prime is 57032447. The reversal of 57032440 is 4423075.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57032447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 712866 + ... + 712945.

Almost surely, 2^57032440 is an apocalyptic number.

It is an amenable number.

57032440 is an abundant number, since it is smaller than the sum of its proper divisors (71290640).

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

57032440 is a wasteful number, since it uses less digits than its factorization.

57032440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425822 (or 1425818 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 57032440 is about 7551.9825211662. The cubic root of 57032440 is about 384.9231082739.

The spelling of 57032440 in words is "fifty-seven million, thirty-two thousand, four hundred forty".