57305385 has 48 divisors (see below), whose sum is σ = 106024464. Its totient is φ = 28532736.

The previous prime is 57305383. The next prime is 57305407. The reversal of 57305385 is 58350375.

57305385 is a `hidden beast` number, since 573 + 0 + 5 + 3 + 85 = 666.

57305385 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 8 ways, for example, as 514089 + 56791296 = 717^2 + 7536^2 .

It is not a de Polignac number, because 57305385 - 2¹ = 57305383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57305383) 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 47 ways as a sum of consecutive naturals, for example, 132129 + ... + 132561.

It is an arithmetic number, because the mean of its divisors is an integer number (2208843).

Almost surely, 2^57305385 is an apocalyptic number.

It is an amenable number.

57305385 is a deficient number, since it is larger than the sum of its proper divisors (48719079).

57305385 is a wasteful number, since it uses less digits than its factorization.

57305385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634 (or 631 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The square root of 57305385 is about 7570.0320342783. The cubic root of 57305385 is about 385.5361843833.

The spelling of 57305385 in words is "fifty-seven million, three hundred five thousand, three hundred eighty-five".