57428306440 has 16 divisors (see below), whose sum is σ = 129213689580. Its totient is φ = 22971322560.

The previous prime is 57428306437. The next prime is 57428306471. The reversal of 57428306440 is 4460382475.

It can be written as a sum of positive squares in 2 ways, for example, as 57407201604 + 21104836 = 239598^2 + 4594^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 717853791 + ... + 717853870.

Almost surely, 2^57428306440 is an apocalyptic number.

It is an amenable number.

57428306440 is an abundant number, since it is smaller than the sum of its proper divisors (71785383140).

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

57428306440 is a wasteful number, since it uses less digits than its factorization.

57428306440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435707672 (or 1435707668 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 43.

The spelling of 57428306440 in words is "fifty-seven billion, four hundred twenty-eight million, three hundred six thousand, four hundred forty".