22438040 has 32 divisors (see below), whose sum is σ = 51014880. Its totient is φ = 8881152.

The previous prime is 22438033. The next prime is 22438049. The reversal of 22438040 is 4083422.

It is a junction number, because it is equal to n+sod(n) for n = 22437997 and 22438015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22438049) 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, 989 + ... + 6771.

It is an arithmetic number, because the mean of its divisors is an integer number (1594215).

Almost surely, 2^22438040 is an apocalyptic number.

22438040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22438040 is an abundant number, since it is smaller than the sum of its proper divisors (28576840).

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

22438040 is a wasteful number, since it uses less digits than its factorization.

22438040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5891 (or 5887 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 22438040 is about 4736.8808302511. The cubic root of 22438040 is about 282.0514300176.

The spelling of 22438040 in words is "twenty-two million, four hundred thirty-eight thousand, forty".