22780912 has 90 divisors (see below), whose sum is σ = 56831432. Its totient is φ = 8659200.

The previous prime is 22780889. The next prime is 22780931. The reversal of 22780912 is 21908722.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 555612 + ... + 555652.

Almost surely, 2^22780912 is an apocalyptic number.

22780912 is a gapful number since it is divisible by the number (22) 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 22780912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28415716).

22780912 is an abundant number, since it is smaller than the sum of its proper divisors (34050520).

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

22780912 is a wasteful number, since it uses less digits than its factorization.

22780912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 22780912 is about 4772.9353651605. The cubic root of 22780912 is about 283.4808342332.

Multiplying 22780912 by its product of nonzero digits (4032), we get a square (91852637184 = 303072²).

The spelling of 22780912 in words is "twenty-two million, seven hundred eighty thousand, nine hundred twelve".