22640912 has 40 divisors (see below), whose sum is σ = 51758592. Its totient is φ = 9388800.

The previous prime is 22640899. The next prime is 22640921. The reversal of 22640912 is 21904622.

It is a super-2 number, since 2×22640912² = 1025221792383488, 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, 212 + ... + 6732.

Almost surely, 2^22640912 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 22640912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25879296).

22640912 is an abundant number, since it is smaller than the sum of its proper divisors (29117680).

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

22640912 is a wasteful number, since it uses less digits than its factorization.

22640912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6567 (or 6561 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 22640912 is about 4758.2467359312. The cubic root of 22640912 is about 282.8989304751.

The spelling of 22640912 in words is "twenty-two million, six hundred forty thousand, nine hundred twelve".