22338440 has 64 divisors (see below), whose sum is σ = 52662960. Its totient is φ = 8519680.

The previous prime is 22338427. The next prime is 22338461. The reversal of 22338440 is 4483322.

It can be written as a sum of positive squares in 8 ways, for example, as 13205956 + 9132484 = 3634^2 + 3022^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86792 + ... + 87048.

Almost surely, 2^22338440 is an apocalyptic number.

22338440 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 22338440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26331480).

22338440 is an abundant number, since it is smaller than the sum of its proper divisors (30324520).

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

22338440 is a wasteful number, since it uses less digits than its factorization.

22338440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 22338440 is about 4726.3558901124. The cubic root of 22338440 is about 281.6334792001.

The spelling of 22338440 in words is "twenty-two million, three hundred thirty-eight thousand, four hundred forty".