57856409 has 8 divisors (see below), whose sum is σ = 63185472. Its totient is φ = 52652880.

The previous prime is 57856397. The next prime is 57856417. The reversal of 57856409 is 90465875.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57856409 - 2⁸ = 57856153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57856409.

It is not an unprimeable number, because it can be changed into a prime (57856429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30419 + ... + 32264.

It is an arithmetic number, because the mean of its divisors is an integer number (7898184).

Almost surely, 2^57856409 is an apocalyptic number.

It is an amenable number.

57856409 is a deficient number, since it is larger than the sum of its proper divisors (5329063).

57856409 is a wasteful number, since it uses less digits than its factorization.

57856409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62767.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 57856409 is about 7606.3400528769. The cubic root of 57856409 is about 386.7679615544.

The spelling of 57856409 in words is "fifty-seven million, eight hundred fifty-six thousand, four hundred nine".