22997904 has 80 divisors (see below), whose sum is σ = 63329280. Its totient is φ = 7171200.

The previous prime is 22997903. The next prime is 22997911. The reversal of 22997904 is 40979922.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (22997903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137629 + ... + 137795.

It is an arithmetic number, because the mean of its divisors is an integer number (791616).

Almost surely, 2^22997904 is an apocalyptic number.

22997904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22997904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31664640).

22997904 is an abundant number, since it is smaller than the sum of its proper divisors (40331376).

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

22997904 is a wasteful number, since it uses less digits than its factorization.

22997904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 22997904 is about 4795.6129952280. The cubic root of 22997904 is about 284.3780589616.

The spelling of 22997904 in words is "twenty-two million, nine hundred ninety-seven thousand, nine hundred four".