22144280 has 16 divisors (see below), whose sum is σ = 49824720. Its totient is φ = 8857696.

The previous prime is 22144273. The next prime is 22144289. The reversal of 22144280 is 8244122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22144289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276764 + ... + 276843.

It is an arithmetic number, because the mean of its divisors is an integer number (3114045).

Almost surely, 2^22144280 is an apocalyptic number.

22144280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22144280 is an abundant number, since it is smaller than the sum of its proper divisors (27680440).

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

22144280 is a wasteful number, since it uses less digits than its factorization.

22144280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553618 (or 553614 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 22144280 is about 4705.7709251514. The cubic root of 22144280 is about 280.8151416472.

The spelling of 22144280 in words is "twenty-two million, one hundred forty-four thousand, two hundred eighty".