22664840 has 32 divisors (see below), whose sum is σ = 55632960. Its totient is φ = 8241600.

The previous prime is 22664839. The next prime is 22664849. The reversal of 22664840 is 4846622.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22664797 and 22664806.

It is not an unprimeable number, because it can be changed into a prime (22664849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25316 + ... + 26195.

It is an arithmetic number, because the mean of its divisors is an integer number (1738530).

Almost surely, 2^22664840 is an apocalyptic number.

22664840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22664840 is an abundant number, since it is smaller than the sum of its proper divisors (32968120).

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

22664840 is a wasteful number, since it uses less digits than its factorization.

22664840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51533 (or 51529 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 22664840 is about 4760.7604434586. The cubic root of 22664840 is about 282.9985557660.

The spelling of 22664840 in words is "twenty-two million, six hundred sixty-four thousand, eight hundred forty".