57057287 has 8 divisors (see below), whose sum is σ = 69044256. Its totient is φ = 46029312.

The previous prime is 57057283. The next prime is 57057317. The reversal of 57057287 is 78275075.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 57057287 - 2² = 57057283 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57057283) 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 7 ways as a sum of consecutive naturals, for example, 239618 + ... + 239855.

It is an arithmetic number, because the mean of its divisors is an integer number (8630532).

Almost surely, 2^57057287 is an apocalyptic number.

57057287 is a deficient number, since it is larger than the sum of its proper divisors (11986969).

57057287 is a wasteful number, since it uses less digits than its factorization.

57057287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479497.

The product of its (nonzero) digits is 137200, while the sum is 41.

The square root of 57057287 is about 7553.6274067497. The cubic root of 57057287 is about 384.9789992480.

The spelling of 57057287 in words is "fifty-seven million, fifty-seven thousand, two hundred eighty-seven".