22281408 has 84 divisors (see below), whose sum is σ = 64666368. Its totient is φ = 7334400.

The previous prime is 22281403. The next prime is 22281421. The reversal of 22281408 is 80418222.

It is a super-2 number, since 2×22281408² = 992922284924928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22281401) 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 11 ways as a sum of consecutive naturals, for example, 57985 + ... + 58367.

Almost surely, 2^22281408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22281408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32333184).

22281408 is an abundant number, since it is smaller than the sum of its proper divisors (42384960).

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

22281408 is a wasteful number, since it uses less digits than its factorization.

22281408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502 (or 489 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 22281408 is about 4720.3186333128. The cubic root of 22281408 is about 281.3935965980.

The spelling of 22281408 in words is "twenty-two million, two hundred eighty-one thousand, four hundred eight".