22997664 has 72 divisors (see below), whose sum is σ = 66830400. Its totient is φ = 7498368.

The previous prime is 22997641. The next prime is 22997693. The reversal of 22997664 is 46679922.

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12687 + ... + 14385.

It is an arithmetic number, because the mean of its divisors is an integer number (928200).

Almost surely, 2^22997664 is an apocalyptic number.

22997664 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 22997664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33415200).

22997664 is an abundant number, since it is smaller than the sum of its proper divisors (43832736).

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

22997664 is a wasteful number, since it uses less digits than its factorization.

22997664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1762 (or 1751 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 22997664 is about 4795.5879722929. The cubic root of 22997664 is about 284.3770697269.

The spelling of 22997664 in words is "twenty-two million, nine hundred ninety-seven thousand, six hundred sixty-four".