22256644 has 6 divisors (see below), whose sum is σ = 38949134. Its totient is φ = 11128320.

The previous prime is 22256639. The next prime is 22256651. The reversal of 22256644 is 44665222.

It can be written as a sum of positive squares in only one way, i.e., 12334144 + 9922500 = 3512^2 + 3150^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2782077 + ... + 2782084.

Almost surely, 2^22256644 is an apocalyptic number.

It is an amenable number.

22256644 is a deficient number, since it is larger than the sum of its proper divisors (16692490).

22256644 is a wasteful number, since it uses less digits than its factorization.

22256644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5564165 (or 5564163 counting only the distinct ones).

The product of its digits is 23040, while the sum is 31.

The square root of 22256644 is about 4717.6947760532. The cubic root of 22256644 is about 281.2893091394.

The spelling of 22256644 in words is "twenty-two million, two hundred fifty-six thousand, six hundred forty-four".