22656647 has 12 divisors (see below), whose sum is σ = 24858720. Its totient is φ = 20636928.

The previous prime is 22656637. The next prime is 22656659. The reversal of 22656647 is 74665622.

It is not a de Polignac number, because 22656647 - 2⁸ = 22656391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22656647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22656637) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12503 + ... + 14199.

It is an arithmetic number, because the mean of its divisors is an integer number (2071560).

Almost surely, 2^22656647 is an apocalyptic number.

22656647 is a deficient number, since it is larger than the sum of its proper divisors (2202073).

22656647 is a wasteful number, since it uses less digits than its factorization.

22656647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802 (or 1789 counting only the distinct ones).

The product of its digits is 120960, while the sum is 38.

The square root of 22656647 is about 4759.8998939053. The cubic root of 22656647 is about 282.9644517440.

The spelling of 22656647 in words is "twenty-two million, six hundred fifty-six thousand, six hundred forty-seven".