22605640 has 32 divisors (see below), whose sum is σ = 51010560. Its totient is φ = 9016000.

The previous prime is 22605593. The next prime is 22605641. The reversal of 22605640 is 4650622.

It is a super-2 number, since 2×22605640² = 1022029919619200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22605641) 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 7 ways as a sum of consecutive naturals, for example, 19065 + ... + 20215.

It is an arithmetic number, because the mean of its divisors is an integer number (1594080).

Almost surely, 2^22605640 is an apocalyptic number.

22605640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22605640 is an abundant number, since it is smaller than the sum of its proper divisors (28404920).

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

22605640 is a wasteful number, since it uses less digits than its factorization.

22605640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653 (or 1649 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 22605640 is about 4754.5388840560. The cubic root of 22605640 is about 282.7519458584.

The spelling of 22605640 in words is "twenty-two million, six hundred five thousand, six hundred forty".