57102690 has 32 divisors (see below), whose sum is σ = 138335040. Its totient is φ = 15084224.

The previous prime is 57102637. The next prime is 57102691. The reversal of 57102690 is 9620175.

57102690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×57102690² = 6521434410472200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (57102691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5685 + ... + 12104.

It is an arithmetic number, because the mean of its divisors is an integer number (4322970).

Almost surely, 2^57102690 is an apocalyptic number.

57102690 is an abundant number, since it is smaller than the sum of its proper divisors (81232350).

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

57102690 is a wasteful number, since it uses less digits than its factorization.

57102690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17906.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 57102690 is about 7556.6321863645. The cubic root of 57102690 is about 385.0810870978.

The spelling of 57102690 in words is "fifty-seven million, one hundred two thousand, six hundred ninety".