22372440 has 32 divisors (see below), whose sum is σ = 67117680. Its totient is φ = 5965952.

The previous prime is 22372417. The next prime is 22372451. The reversal of 22372440 is 4427322.

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 22372440.

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, 93099 + ... + 93338.

Almost surely, 2^22372440 is an apocalyptic number.

22372440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22372440 is an abundant number, since it is smaller than the sum of its proper divisors (44745240).

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

22372440 is a wasteful number, since it uses less digits than its factorization.

22372440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186451 (or 186447 counting only the distinct ones).

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

The square root of 22372440 is about 4729.9513739572. The cubic root of 22372440 is about 281.7762925788.

Adding to 22372440 its reverse (4427322), we get a palindrome (26799762).

The spelling of 22372440 in words is "twenty-two million, three hundred seventy-two thousand, four hundred forty".