57857265 has 12 divisors (see below), whose sum is σ = 100286004. Its totient is φ = 30857184.

The previous prime is 57857251. The next prime is 57857269. The reversal of 57857265 is 56275875.

57857265 is a `hidden beast` number, since 5 + 78 + 572 + 6 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9290304 + 48566961 = 3048^2 + 6969^2 .

It is not a de Polignac number, because 57857265 - 2⁶ = 57857201 is a prime.

It is a super-2 number, since 2×57857265² = 6694926226560450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1285717 = 57857265 / (5 + 7 + 8 + 5 + 7 + 2 + 6 + 5).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 57857265.

It is not an unprimeable number, because it can be changed into a prime (57857269) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 642814 + ... + 642903.

It is an arithmetic number, because the mean of its divisors is an integer number (8357167).

Almost surely, 2^57857265 is an apocalyptic number.

It is an amenable number.

57857265 is a deficient number, since it is larger than the sum of its proper divisors (42428739).

57857265 is a wasteful number, since it uses less digits than its factorization.

57857265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285728 (or 1285725 counting only the distinct ones).

The product of its digits is 588000, while the sum is 45.

The square root of 57857265 is about 7606.3963215178. The cubic root of 57857265 is about 386.7698689878.

The spelling of 57857265 in words is "fifty-seven million, eight hundred fifty-seven thousand, two hundred sixty-five".