22449280 has 64 divisors (see below), whose sum is σ = 61346880. Its totient is φ = 7695360.

The previous prime is 22449257. The next prime is 22449283. The reversal of 22449280 is 8294422.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (22449283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1975 + ... + 6985.

It is an arithmetic number, because the mean of its divisors is an integer number (958545).

Almost surely, 2^22449280 is an apocalyptic number.

22449280 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 22449280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30673440).

22449280 is an abundant number, since it is smaller than the sum of its proper divisors (38897600).

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

22449280 is an equidigital number, since it uses as much as digits as its factorization.

22449280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5037 (or 5025 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 22449280 is about 4738.0671164516. The cubic root of 22449280 is about 282.0985186352.

The spelling of 22449280 in words is "twenty-two million, four hundred forty-nine thousand, two hundred eighty".