22344640 has 28 divisors (see below), whose sum is σ = 53208936. Its totient is φ = 8937728.

The previous prime is 22344617. The next prime is 22344653. The reversal of 22344640 is 4644322.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34594 + ... + 35233.

Almost surely, 2^22344640 is an apocalyptic number.

22344640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22344640 is an abundant number, since it is smaller than the sum of its proper divisors (30864296).

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

22344640 is an equidigital number, since it uses as much as digits as its factorization.

22344640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69844 (or 69834 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 22344640 is about 4727.0117410474. The cubic root of 22344640 is about 281.6595324376.

Adding to 22344640 its reverse (4644322), we get a palindrome (26988962).

The spelling of 22344640 in words is "twenty-two million, three hundred forty-four thousand, six hundred forty".