22856440 has 32 divisors (see below), whose sum is σ = 51662160. Its totient is φ = 9100800.

The previous prime is 22856399. The next prime is 22856489. The reversal of 22856440 is 4465822.

22856440 = 180² + 181² + ... + 420².

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 8455 + ... + 10825.

Almost surely, 2^22856440 is an apocalyptic number.

22856440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22856440 is an abundant number, since it is smaller than the sum of its proper divisors (28805720).

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

22856440 is a wasteful number, since it uses less digits than its factorization.

22856440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2623 (or 2619 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 22856440 is about 4780.8409302130. The cubic root of 22856440 is about 283.7937734483.

The spelling of 22856440 in words is "twenty-two million, eight hundred fifty-six thousand, four hundred forty".