22764690 has 48 divisors (see below), whose sum is σ = 63744408. Its totient is φ = 5603328.

The previous prime is 22764671. The next prime is 22764697. The reversal of 22764690 is 9646722.

It is a happy number.

22764690 is a `hidden beast` number, since 2 + 2 + 7 + 646 + 9 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 17715681 + 5049009 = 4209^2 + 2247^2 .

It is a super-2 number, since 2×22764690² = 1036462221592200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22764697) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 8559 + ... + 10898.

Almost surely, 2^22764690 is an apocalyptic number.

22764690 is an abundant number, since it is smaller than the sum of its proper divisors (40979718).

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

22764690 is a wasteful number, since it uses less digits than its factorization.

22764690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19483 (or 19480 counting only the distinct ones).

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

The square root of 22764690 is about 4771.2356890013. The cubic root of 22764690 is about 283.4135305469.

The spelling of 22764690 in words is "twenty-two million, seven hundred sixty-four thousand, six hundred ninety".