22790664 has 72 divisors (see below), whose sum is σ = 66873690. Its totient is φ = 7008768.

The previous prime is 22790641. The next prime is 22790681. The reversal of 22790664 is 46609722.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 4796100 + 17994564 = 2190^2 + 4242^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11232 + ... + 13104.

Almost surely, 2^22790664 is an apocalyptic number.

22790664 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 22790664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33436845).

22790664 is an abundant number, since it is smaller than the sum of its proper divisors (44083026).

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

22790664 is a wasteful number, since it uses less digits than its factorization.

22790664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1911 (or 1891 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 22790664 is about 4773.9568494070. The cubic root of 22790664 is about 283.5212790687.

The spelling of 22790664 in words is "twenty-two million, seven hundred ninety thousand, six hundred sixty-four".