22394440 has 32 divisors (see below), whose sum is σ = 53353080. Its totient is φ = 8430592.

The previous prime is 22394413. The next prime is 22394441. The reversal of 22394440 is 4449322.

It can be written as a sum of positive squares in 4 ways, for example, as 15350724 + 7043716 = 3918^2 + 2654^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22394399 and 22394408.

It is not an unprimeable number, because it can be changed into a prime (22394441) 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, 15787 + ... + 17146.

Almost surely, 2^22394440 is an apocalyptic number.

22394440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22394440 is an abundant number, since it is smaller than the sum of its proper divisors (30958640).

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

22394440 is a wasteful number, since it uses less digits than its factorization.

22394440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32961 (or 32957 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 22394440 is about 4732.2764078190. The cubic root of 22394440 is about 281.8686241497.

The spelling of 22394440 in words is "twenty-two million, three hundred ninety-four thousand, four hundred forty".