22146904 has 32 divisors (see below), whose sum is σ = 45465840. Its totient is φ = 10051200.

The previous prime is 22146893. The next prime is 22146919. The reversal of 22146904 is 40964122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4599 + ... + 8089.

Almost surely, 2^22146904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22146904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22732920).

22146904 is an abundant number, since it is smaller than the sum of its proper divisors (23318936).

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

22146904 is a wasteful number, since it uses less digits than its factorization.

22146904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3571 (or 3567 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 22146904 is about 4706.0497234942. The cubic root of 22146904 is about 280.8262329964.

The spelling of 22146904 in words is "twenty-two million, one hundred forty-six thousand, nine hundred four".