57285186 has 16 divisors (see below), whose sum is σ = 130937664. Its totient is φ = 16367184.

The previous prime is 57285181. The next prime is 57285187. The reversal of 57285186 is 68158275.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 1363933 = 57285186 / (5 + 7 + 2 + 8 + 5 + 1 + 8 + 6).

It is not an unprimeable number, because it can be changed into a prime (57285181) 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, 681925 + ... + 682008.

It is an arithmetic number, because the mean of its divisors is an integer number (8183604).

Almost surely, 2^57285186 is an apocalyptic number.

57285186 is an abundant number, since it is smaller than the sum of its proper divisors (73652478).

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

57285186 is a wasteful number, since it uses less digits than its factorization.

57285186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363945.

The product of its digits is 134400, while the sum is 42.

The square root of 57285186 is about 7568.6977743863. The cubic root of 57285186 is about 385.4908811333.

It can be divided in two parts, 572 and 85186, that added together give a palindrome (85758).

The spelling of 57285186 in words is "fifty-seven million, two hundred eighty-five thousand, one hundred eighty-six".