22786764 has 144 divisors (see below), whose sum is σ = 72930816. Its totient is φ = 5443200.

The previous prime is 22786763. The next prime is 22786787. The reversal of 22786764 is 46768722.

It is a super-2 number, since 2×22786764² = 1038473227183392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (22786763) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 83949 + ... + 84219.

It is an arithmetic number, because the mean of its divisors is an integer number (506464).

Almost surely, 2^22786764 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22786764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36465408).

22786764 is an abundant number, since it is smaller than the sum of its proper divisors (50144052).

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

22786764 is a wasteful number, since it uses less digits than its factorization.

22786764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 307 counting only the distinct ones).

The product of its digits is 225792, while the sum is 42.

The square root of 22786764 is about 4773.5483657338. The cubic root of 22786764 is about 283.5051058370.

The spelling of 22786764 in words is "twenty-two million, seven hundred eighty-six thousand, seven hundred sixty-four".