22237440 has 72 divisors (see below), whose sum is σ = 71033088. Its totient is φ = 5928960.

The previous prime is 22237421. The next prime is 22237441. The reversal of 22237440 is 4473222.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 22237440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22237441) 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, 945 + ... + 6735.

Almost surely, 2^22237440 is an apocalyptic number.

22237440 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 22237440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35516544).

22237440 is an abundant number, since it is smaller than the sum of its proper divisors (48795648).

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

22237440 is an equidigital number, since it uses as much as digits as its factorization.

22237440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5815 (or 5801 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 24.

The square root of 22237440 is about 4715.6590207520. The cubic root of 22237440 is about 281.2083829780.

The spelling of 22237440 in words is "twenty-two million, two hundred thirty-seven thousand, four hundred forty".