22400856 has 24 divisors (see below), whose sum is σ = 60669180. Its totient is φ = 7466928.

The previous prime is 22400843. The next prime is 22400863. The reversal of 22400856 is 65800422.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 155490 + ... + 155633.

Almost surely, 2^22400856 is an apocalyptic number.

It is an amenable number.

22400856 is an abundant number, since it is smaller than the sum of its proper divisors (38268324).

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

22400856 is a wasteful number, since it uses less digits than its factorization.

22400856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311135 (or 311128 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 22400856 is about 4732.9542571210. The cubic root of 22400856 is about 281.8955400034.

The spelling of 22400856 in words is "twenty-two million, four hundred thousand, eight hundred fifty-six".