22439720 has 32 divisors (see below), whose sum is σ = 52686720. Its totient is φ = 8585280.

The previous prime is 22439717. The next prime is 22439737. The reversal of 22439720 is 2793422.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11276 + ... + 13115.

It is an arithmetic number, because the mean of its divisors is an integer number (1646460).

Almost surely, 2^22439720 is an apocalyptic number.

22439720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22439720 is an abundant number, since it is smaller than the sum of its proper divisors (30247000).

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

22439720 is a wasteful number, since it uses less digits than its factorization.

22439720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24425 (or 24421 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 22439720 is about 4737.0581588154. The cubic root of 22439720 is about 282.0584691734.

The spelling of 22439720 in words is "twenty-two million, four hundred thirty-nine thousand, seven hundred twenty".