22640756 has 6 divisors (see below), whose sum is σ = 39621330. Its totient is φ = 11320376.

The previous prime is 22640749. The next prime is 22640759. The reversal of 22640756 is 65704622.

It can be written as a sum of positive squares in only one way, i.e., 12013156 + 10627600 = 3466^2 + 3260^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22640759) by changing a digit.

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 as a sum of consecutive naturals, namely, 2830091 + ... + 2830098.

It is an arithmetic number, because the mean of its divisors is an integer number (6603555).

Almost surely, 2^22640756 is an apocalyptic number.

It is an amenable number.

22640756 is a deficient number, since it is larger than the sum of its proper divisors (16980574).

22640756 is a wasteful number, since it uses less digits than its factorization.

22640756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5660193 (or 5660191 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 22640756 is about 4758.2303433104. The cubic root of 22640756 is about 282.8982807319.

The spelling of 22640756 in words is "twenty-two million, six hundred forty thousand, seven hundred fifty-six".