22778880 has 88 divisors (see below), whose sum is σ = 72905952. Its totient is φ = 6070272.

The previous prime is 22778869. The next prime is 22778911. The reversal of 22778880 is 8887722.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14619 + ... + 16101.

Almost surely, 2^22778880 is an apocalyptic number.

22778880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22778880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36452976).

22778880 is an abundant number, since it is smaller than the sum of its proper divisors (50127072).

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

22778880 is a wasteful number, since it uses less digits than its factorization.

22778880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511 (or 1493 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 42.

The square root of 22778880 is about 4772.7224935041. The cubic root of 22778880 is about 283.4724053903.

The spelling of 22778880 in words is "twenty-two million, seven hundred seventy-eight thousand, eight hundred eighty".