22289868 has 36 divisors (see below), whose sum is σ = 58164288. Its totient is φ = 7189920.

The previous prime is 22289863. The next prime is 22289879. The reversal of 22289868 is 86898222.

22289868 = T₃₄₂ + T₃₄₃ + ... + T₅₅₇.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22289863) 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, 8871 + ... + 11102.

Almost surely, 2^22289868 is an apocalyptic number.

It is an amenable number.

22289868 is an abundant number, since it is smaller than the sum of its proper divisors (35874420).

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

22289868 is a wasteful number, since it uses less digits than its factorization.

22289868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20014 (or 20009 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 22289868 is about 4721.2146742126. The cubic root of 22289868 is about 281.4292060860.

The spelling of 22289868 in words is "twenty-two million, two hundred eighty-nine thousand, eight hundred sixty-eight".