22640456 has 16 divisors (see below), whose sum is σ = 42508800. Its totient is φ = 11304784.

The previous prime is 22640437. The next prime is 22640461. The reversal of 22640456 is 65404622.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6425 + ... + 9303.

It is an arithmetic number, because the mean of its divisors is an integer number (2656800).

Almost surely, 2^22640456 is an apocalyptic number.

It is an amenable number.

22640456 is a deficient number, since it is larger than the sum of its proper divisors (19868344).

22640456 is a wasteful number, since it uses less digits than its factorization.

22640456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3868 (or 3864 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 22640456 is about 4758.1988188809. The cubic root of 22640456 is about 282.8970312174.

The spelling of 22640456 in words is "twenty-two million, six hundred forty thousand, four hundred fifty-six".