22445280 has 288 divisors, whose sum is σ = 90810720. Its totient is φ = 4976640.

The previous prime is 22445279. The next prime is 22445281. The reversal of 22445280 is 8254422.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22445279) and next prime (22445281).

It is a tau number, because it is divible by the number of its divisors (288).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22445281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 205866 + ... + 205974.

It is an arithmetic number, because the mean of its divisors is an integer number (315315).

Almost surely, 2^22445280 is an apocalyptic number.

22445280 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 22445280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45405360).

22445280 is an abundant number, since it is smaller than the sum of its proper divisors (68365440).

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

22445280 is a wasteful number, since it uses less digits than its factorization.

22445280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 22445280 is about 4737.6449845889. The cubic root of 22445280 is about 282.0817629219.

The spelling of 22445280 in words is "twenty-two million, four hundred forty-five thousand, two hundred eighty".