22785880 has 64 divisors (see below), whose sum is σ = 57153600. Its totient is φ = 8117760.

The previous prime is 22785871. The next prime is 22785887. The reversal of 22785880 is 8858722.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22785887) 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, 14325 + ... + 15835.

It is an arithmetic number, because the mean of its divisors is an integer number (893025).

Almost surely, 2^22785880 is an apocalyptic number.

22785880 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 22785880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28576800).

22785880 is an abundant number, since it is smaller than the sum of its proper divisors (34367720).

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

22785880 is a wasteful number, since it uses less digits than its factorization.

22785880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564 (or 1560 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 40.

The square root of 22785880 is about 4773.4557712416. The cubic root of 22785880 is about 283.5014396480.

The spelling of 22785880 in words is "twenty-two million, seven hundred eighty-five thousand, eight hundred eighty".