22547889 has 120 divisors (see below), whose sum is σ = 46347840. Its totient is φ = 10777536.

The previous prime is 22547873. The next prime is 22547897. The reversal of 22547889 is 98874522.

22547889 is a `hidden beast` number, since 22 + 547 + 8 + 89 = 666.

It is not a de Polignac number, because 22547889 - 2⁴ = 22547873 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22547809) 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 119 ways as a sum of consecutive naturals, for example, 980332 + ... + 980354.

It is an arithmetic number, because the mean of its divisors is an integer number (386232).

Almost surely, 2^22547889 is an apocalyptic number.

It is an amenable number.

22547889 is an abundant number, since it is smaller than the sum of its proper divisors (23799951).

22547889 is a wasteful number, since it uses less digits than its factorization.

22547889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81 (or 65 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 22547889 is about 4748.4617509252. The cubic root of 22547889 is about 282.5109568413.

It can be divided in two parts, 22547 and 889, that added together give a triangular number (23436 = T₂₁₆).

The spelling of 22547889 in words is "twenty-two million, five hundred forty-seven thousand, eight hundred eighty-nine".