22978256 has 80 divisors (see below), whose sum is σ = 53568000. Its totient is φ = 9539712.

The previous prime is 22978247. The next prime is 22978259. The reversal of 22978256 is 65287922.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22978259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 290825 + ... + 290903.

It is an arithmetic number, because the mean of its divisors is an integer number (669600).

Almost surely, 2^22978256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22978256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26784000).

22978256 is an abundant number, since it is smaller than the sum of its proper divisors (30589744).

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

22978256 is an equidigital number, since it uses as much as digits as its factorization.

22978256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 141 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 22978256 is about 4793.5640185565. The cubic root of 22978256 is about 284.2970508249.

The spelling of 22978256 in words is "twenty-two million, nine hundred seventy-eight thousand, two hundred fifty-six".