57025809 has 32 divisors (see below), whose sum is σ = 88761600. Its totient is φ = 36115200.

The previous prime is 57025807. The next prime is 57025819. The reversal of 57025809 is 90852075.

57025809 is a `hidden beast` number, since 5 + 70 + 2 + 580 + 9 = 666.

It is not a de Polignac number, because 57025809 - 2¹ = 57025807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57025807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 142009 + ... + 142409.

It is an arithmetic number, because the mean of its divisors is an integer number (2773800).

Almost surely, 2^57025809 is an apocalyptic number.

It is an amenable number.

57025809 is a deficient number, since it is larger than the sum of its proper divisors (31735791).

57025809 is a wasteful number, since it uses less digits than its factorization.

57025809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662 (or 656 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 57025809 is about 7551.5434846129. The cubic root of 57025809 is about 384.9081897231.

It can be divided in two parts, 5702 and 5809, that added together give a palindrome (11511).

The spelling of 57025809 in words is "fifty-seven million, twenty-five thousand, eight hundred nine".