22568640 has 56 divisors (see below), whose sum is σ = 71658480. Its totient is φ = 6018048.

The previous prime is 22568633. The next prime is 22568653. The reversal of 22568640 is 4686522.

It is a super-2 number, since 2×22568640² = 1018687022899200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10795 + ... + 12714.

Almost surely, 2^22568640 is an apocalyptic number.

22568640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22568640 is an abundant number, since it is smaller than the sum of its proper divisors (49089840).

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

22568640 is a wasteful number, since it uses less digits than its factorization.

22568640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23529 (or 23519 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 22568640 is about 4750.6462718245. The cubic root of 22568640 is about 282.5975959554.

The spelling of 22568640 in words is "twenty-two million, five hundred sixty-eight thousand, six hundred forty".