57400040 has 16 divisors (see below), whose sum is σ = 129150180. Its totient is φ = 22960000.

The previous prime is 57400037. The next prime is 57400073. The reversal of 57400040 is 4000475.

It can be written as a sum of positive squares in 2 ways, for example, as 57123364 + 276676 = 7558^2 + 526^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 57399985 and 57400021.

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, 717461 + ... + 717540.

Almost surely, 2^57400040 is an apocalyptic number.

It is an amenable number.

57400040 is an abundant number, since it is smaller than the sum of its proper divisors (71750140).

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

57400040 is a wasteful number, since it uses less digits than its factorization.

57400040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435012 (or 1435008 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 57400040 is about 7576.2814097683. The cubic root of 57400040 is about 385.7483392757.

The spelling of 57400040 in words is "fifty-seven million, four hundred thousand, forty".