57189645 has 20 divisors (see below), whose sum is σ = 102518460. Its totient is φ = 30500928.

The previous prime is 57189641. The next prime is 57189667. The reversal of 57189645 is 54698175.

It can be written as a sum of positive squares in 2 ways, for example, as 15896169 + 41293476 = 3987^2 + 6426^2 .

It is not a de Polignac number, because 57189645 - 2² = 57189641 is a prime.

It is a super-3 number, since 3×57189645³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 57189645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57189641) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 70200 + ... + 71009.

It is an arithmetic number, because the mean of its divisors is an integer number (5125923).

Almost surely, 2^57189645 is an apocalyptic number.

It is an amenable number.

57189645 is a deficient number, since it is larger than the sum of its proper divisors (45328815).

57189645 is a wasteful number, since it uses less digits than its factorization.

57189645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141226 (or 141217 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 57189645 is about 7562.3835528225. The cubic root of 57189645 is about 385.2764529299.

The spelling of 57189645 in words is "fifty-seven million, one hundred eighty-nine thousand, six hundred forty-five".