22144380 has 48 divisors (see below), whose sum is σ = 62445600. Its totient is φ = 5863168.

The previous prime is 22144361. The next prime is 22144391. The reversal of 22144380 is 8344122.

It is a self number, because there is not a number n which added to its sum of digits gives 22144380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7702 + ... + 10178.

It is an arithmetic number, because the mean of its divisors is an integer number (1300950).

Almost surely, 2^22144380 is an apocalyptic number.

22144380 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 22144380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31222800).

22144380 is an abundant number, since it is smaller than the sum of its proper divisors (40301220).

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

22144380 is a wasteful number, since it uses less digits than its factorization.

22144380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2638 (or 2636 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 22144380 is about 4705.7815503910. The cubic root of 22144380 is about 280.8155643518.

The spelling of 22144380 in words is "twenty-two million, one hundred forty-four thousand, three hundred eighty".