57400240 has 40 divisors (see below), whose sum is σ = 135460080. Its totient is φ = 22615296.

The previous prime is 57400237. The next prime is 57400253. The reversal of 57400240 is 4200475.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6 + ... + 10714.

It is an arithmetic number, because the mean of its divisors is an integer number (3386502).

Almost surely, 2^57400240 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 57400240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67730040).

57400240 is an abundant number, since it is smaller than the sum of its proper divisors (78059840).

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

57400240 is a wasteful number, since it uses less digits than its factorization.

57400240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10789 (or 10783 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 57400240 is about 7576.2946088441. The cubic root of 57400240 is about 385.7487872985.

The spelling of 57400240 in words is "fifty-seven million, four hundred thousand, two hundred forty".