57257340 has 48 divisors (see below), whose sum is σ = 183224832. Its totient is φ = 13087296.

The previous prime is 57257323. The next prime is 57257363. The reversal of 57257340 is 4375275.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67744 + ... + 68583.

It is an arithmetic number, because the mean of its divisors is an integer number (3817184).

Almost surely, 2^57257340 is an apocalyptic number.

It is an amenable number.

57257340 is an abundant number, since it is smaller than the sum of its proper divisors (125967492).

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

57257340 is a wasteful number, since it uses less digits than its factorization.

57257340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136346 (or 136344 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 33.

The square root of 57257340 is about 7566.8580005178. The cubic root of 57257340 is about 385.4284093752.

The spelling of 57257340 in words is "fifty-seven million, two hundred fifty-seven thousand, three hundred forty".