57406817 has 4 divisors (see below), whose sum is σ = 61822740. Its totient is φ = 52990896.

The previous prime is 57406813. The next prime is 57406819. The reversal of 57406817 is 71860475.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6270016 + 51136801 = 2504^2 + 7151^2 .

It is a cyclic number.

It is not a de Polignac number, because 57406817 - 2² = 57406813 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57406813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2207942 + ... + 2207967.

It is an arithmetic number, because the mean of its divisors is an integer number (15455685).

Almost surely, 2^57406817 is an apocalyptic number.

It is an amenable number.

57406817 is a deficient number, since it is larger than the sum of its proper divisors (4415923).

57406817 is a wasteful number, since it uses less digits than its factorization.

57406817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4415922.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 57406817 is about 7576.7286476421. The cubic root of 57406817 is about 385.7635199482.

The spelling of 57406817 in words is "fifty-seven million, four hundred six thousand, eight hundred seventeen".