57505387 has 8 divisors (see below), whose sum is σ = 57968640. Its totient is φ = 57044520.

The previous prime is 57505369. The next prime is 57505391. The reversal of 57505387 is 78350575.

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 57505387 - 2²³ = 49116779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57505337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119814 + ... + 120292.

It is an arithmetic number, because the mean of its divisors is an integer number (7246080).

Almost surely, 2^57505387 is an apocalyptic number.

57505387 is a deficient number, since it is larger than the sum of its proper divisors (463253).

57505387 is a wasteful number, since it uses less digits than its factorization.

57505387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193.

The product of its (nonzero) digits is 147000, while the sum is 40.

The square root of 57505387 is about 7583.2306439934. The cubic root of 57505387 is about 385.9841846098.

The spelling of 57505387 in words is "fifty-seven million, five hundred five thousand, three hundred eighty-seven".