22857189 has 8 divisors (see below), whose sum is σ = 30510240. Its totient is φ = 15221136.

The previous prime is 22857187. The next prime is 22857203. The reversal of 22857189 is 98175822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22857189 - 2¹ = 22857187 is a prime.

It is a super-3 number, since 3×22857189³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22857189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22857187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 682 + ... + 6795.

It is an arithmetic number, because the mean of its divisors is an integer number (3813780).

Almost surely, 2^22857189 is an apocalyptic number.

It is an amenable number.

22857189 is a deficient number, since it is larger than the sum of its proper divisors (7653051).

22857189 is a wasteful number, since it uses less digits than its factorization.

22857189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8499.

The product of its digits is 80640, while the sum is 42.

The square root of 22857189 is about 4780.9192630706. The cubic root of 22857189 is about 283.7968733655.

The spelling of 22857189 in words is "twenty-two million, eight hundred fifty-seven thousand, one hundred eighty-nine".