57612220 has 24 divisors (see below), whose sum is σ = 121179744. Its totient is φ = 23007936.

The previous prime is 57612197. The next prime is 57612221. The reversal of 57612220 is 2221675.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57612221) 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, 12922 + ... + 16798.

It is an arithmetic number, because the mean of its divisors is an integer number (5049156).

Almost surely, 2^57612220 is an apocalyptic number.

It is an amenable number.

57612220 is an abundant number, since it is smaller than the sum of its proper divisors (63567524).

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

57612220 is a wasteful number, since it uses less digits than its factorization.

57612220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4629 (or 4627 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 57612220 is about 7590.2714048972. The cubic root of 57612220 is about 386.2230627451.

Adding to 57612220 its reverse (2221675), we get a palindrome (59833895).

The spelling of 57612220 in words is "fifty-seven million, six hundred twelve thousand, two hundred twenty".