57809857 has 6 divisors (see below), whose sum is σ = 67248258. Its totient is φ = 49551264.

The previous prime is 57809821. The next prime is 57809887. The reversal of 57809857 is 75890875.

57809857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 33593616 + 24216241 = 5796^2 + 4921^2 .

It is not a de Polignac number, because 57809857 - 2⁷ = 57809729 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 1179793 = 57809857 / (5 + 7 + 8 + 0 + 9 + 8 + 5 + 7).

It is a self number, because there is not a number n which added to its sum of digits gives 57809857.

It is not an unprimeable number, because it can be changed into a prime (57809887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 589848 + ... + 589945.

It is an arithmetic number, because the mean of its divisors is an integer number (11208043).

Almost surely, 2^57809857 is an apocalyptic number.

It is an amenable number.

57809857 is a deficient number, since it is larger than the sum of its proper divisors (9438401).

57809857 is a wasteful number, since it uses less digits than its factorization.

57809857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179807 (or 1179800 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 49.

The square root of 57809857 is about 7603.2793582769. The cubic root of 57809857 is about 386.6642009190.

The spelling of 57809857 in words is "fifty-seven million, eight hundred nine thousand, eight hundred fifty-seven".