22344240 has 80 divisors (see below), whose sum is σ = 69825888. Its totient is φ = 5910528.

The previous prime is 22344233. The next prime is 22344313. The reversal of 22344240 is 4244322.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×22344240² = 998530122355200, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 37384 + ... + 37976.

Almost surely, 2^22344240 is an apocalyptic number.

22344240 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 22344240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34912944).

22344240 is an abundant number, since it is smaller than the sum of its proper divisors (47481648).

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

22344240 is a wasteful number, since it uses less digits than its factorization.

22344240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766 (or 760 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 22344240 is about 4726.9694308299. The cubic root of 22344240 is about 281.6578517290.

Adding to 22344240 its reverse (4244322), we get a palindrome (26588562).

The spelling of 22344240 in words is "twenty-two million, three hundred forty-four thousand, two hundred forty".