57394809 has 18 divisors (see below), whose sum is σ = 84901050. Its totient is φ = 37362528.

The previous prime is 57394789. The next prime is 57394817. The reversal of 57394809 is 90849375.

It can be written as a sum of positive squares in only one way, i.e., 30769209 + 26625600 = 5547^2 + 5160^2 .

It is not a de Polignac number, because 57394809 - 2⁷ = 57394681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57394859) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 14917 + ... + 18365.

It is an arithmetic number, because the mean of its divisors is an integer number (4716725).

Almost surely, 2^57394809 is an apocalyptic number.

It is an amenable number.

57394809 is a deficient number, since it is larger than the sum of its proper divisors (27506241).

57394809 is a wasteful number, since it uses less digits than its factorization.

57394809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3541 (or 3495 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 57394809 is about 7575.9361797734. The cubic root of 57394809 is about 385.7366208701.

The spelling of 57394809 in words is "fifty-seven million, three hundred ninety-four thousand, eight hundred nine".