22232440 has 32 divisors (see below), whose sum is σ = 50971680. Its totient is φ = 8724352.

The previous prime is 22232429. The next prime is 22232453. The reversal of 22232440 is 4423222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3124 + ... + 7363.

It is an arithmetic number, because the mean of its divisors is an integer number (1592865).

Almost surely, 2^22232440 is an apocalyptic number.

22232440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22232440 is an abundant number, since it is smaller than the sum of its proper divisors (28739240).

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

22232440 is a wasteful number, since it uses less digits than its factorization.

22232440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10551 (or 10547 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 22232440 is about 4715.1288423542. The cubic root of 22232440 is about 281.1873052024.

Adding to 22232440 its reverse (4423222), we get a palindrome (26655662).

The spelling of 22232440 in words is "twenty-two million, two hundred thirty-two thousand, four hundred forty".