22981824 has 84 divisors (see below), whose sum is σ = 69777864. Its totient is φ = 7206912.

The previous prime is 22981813. The next prime is 22981837. The reversal of 22981824 is 42818922.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8619 + ... + 10965.

Almost surely, 2^22981824 is an apocalyptic number.

22981824 is a gapful number since it is divisible by the number (24) 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 22981824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34888932).

22981824 is an abundant number, since it is smaller than the sum of its proper divisors (46796040).

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

22981824 is a wasteful number, since it uses less digits than its factorization.

22981824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2382 (or 2369 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 22981824 is about 4793.9361697878. The cubic root of 22981824 is about 284.3117650164.

The spelling of 22981824 in words is "twenty-two million, nine hundred eighty-one thousand, eight hundred twenty-four".