57285557 has 12 divisors (see below), whose sum is σ = 66912300. Its totient is φ = 48900096.

The previous prime is 57285541. The next prime is 57285577. The reversal of 57285557 is 75558275.

It can be written as a sum of positive squares in 2 ways, for example, as 51179716 + 6105841 = 7154^2 + 2471^2 .

It is not a de Polignac number, because 57285557 - 2⁴ = 57285541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57285577) 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, 10319 + ... + 14867.

It is an arithmetic number, because the mean of its divisors is an integer number (5576025).

Almost surely, 2^57285557 is an apocalyptic number.

It is an amenable number.

57285557 is a deficient number, since it is larger than the sum of its proper divisors (9626743).

57285557 is a wasteful number, since it uses less digits than its factorization.

57285557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4820 (or 4813 counting only the distinct ones).

The product of its digits is 490000, while the sum is 44.

The square root of 57285557 is about 7568.7222831862. The cubic root of 57285557 is about 385.4917133253.

The spelling of 57285557 in words is "fifty-seven million, two hundred eighty-five thousand, five hundred fifty-seven".