22357989 has 12 divisors (see below), whose sum is σ = 32532396. Its totient is φ = 14795712.

The previous prime is 22357963. The next prime is 22357999. The reversal of 22357989 is 98975322.

It can be written as a sum of positive squares in 2 ways, for example, as 11168964 + 11189025 = 3342^2 + 3345^2 .

It is not a de Polignac number, because 22357989 - 2¹¹ = 22355941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22357999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7834 + ... + 10299.

It is an arithmetic number, because the mean of its divisors is an integer number (2711033).

Almost surely, 2^22357989 is an apocalyptic number.

It is an amenable number.

22357989 is a deficient number, since it is larger than the sum of its proper divisors (10174407).

22357989 is a wasteful number, since it uses less digits than its factorization.

22357989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18276 (or 18273 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 22357989 is about 4728.4235216402. The cubic root of 22357989 is about 281.7156103846.

The spelling of 22357989 in words is "twenty-two million, three hundred fifty-seven thousand, nine hundred eighty-nine".