57212660 has 12 divisors (see below), whose sum is σ = 120146628. Its totient is φ = 22885056.

The previous prime is 57212651. The next prime is 57212663. The reversal of 57212660 is 6621275.

It can be written as a sum of positive squares in 2 ways, for example, as 15713296 + 41499364 = 3964^2 + 6442^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57212663) 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 3 ways as a sum of consecutive naturals, for example, 1430297 + ... + 1430336.

It is an arithmetic number, because the mean of its divisors is an integer number (10012219).

Almost surely, 2^57212660 is an apocalyptic number.

It is an amenable number.

57212660 is an abundant number, since it is smaller than the sum of its proper divisors (62933968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57212660 is a wasteful number, since it uses less digits than its factorization.

57212660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2860642 (or 2860640 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 57212660 is about 7563.9050760834. The cubic root of 57212660 is about 385.3281286505.

The spelling of 57212660 in words is "fifty-seven million, two hundred twelve thousand, six hundred sixty".