22923440 has 20 divisors (see below), whose sum is σ = 53297184. Its totient is φ = 9169344.

The previous prime is 22923437. The next prime is 22923449. The reversal of 22923440 is 4432922.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (22923449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143192 + ... + 143351.

Almost surely, 2^22923440 is an apocalyptic number.

22923440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22923440 is an abundant number, since it is smaller than the sum of its proper divisors (30373744).

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

22923440 is a wasteful number, since it uses less digits than its factorization.

22923440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286556 (or 286550 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 22923440 is about 4787.8429381090. The cubic root of 22923440 is about 284.0708016295.

The spelling of 22923440 in words is "twenty-two million, nine hundred twenty-three thousand, four hundred forty".