57122240 has 84 divisors (see below), whose sum is σ = 158273496. Its totient is φ = 19579392.

The previous prime is 57122237. The next prime is 57122251. The reversal of 57122240 is 4222175.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13859 + ... + 17501.

Almost surely, 2^57122240 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 57122240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79136748).

57122240 is an abundant number, since it is smaller than the sum of its proper divisors (101151256).

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

57122240 is a wasteful number, since it uses less digits than its factorization.

57122240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3674 (or 3657 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 57122240 is about 7557.9256413384. The cubic root of 57122240 is about 385.1250282634.

The spelling of 57122240 in words is "fifty-seven million, one hundred twenty-two thousand, two hundred forty".