22446440 has 16 divisors (see below), whose sum is σ = 50504580. Its totient is φ = 8978560.

The previous prime is 22446439. The next prime is 22446451. The reversal of 22446440 is 4464422.

It can be written as a sum of positive squares in 2 ways, for example, as 18438436 + 4008004 = 4294^2 + 2002^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280541 + ... + 280620.

Almost surely, 2^22446440 is an apocalyptic number.

22446440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22446440 is an abundant number, since it is smaller than the sum of its proper divisors (28058140).

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

22446440 is a wasteful number, since it uses less digits than its factorization.

22446440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561172 (or 561168 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 22446440 is about 4737.7674067012. The cubic root of 22446440 is about 282.0866222837.

It can be divided in two parts, 224 and 46440, that added together give a palindrome (46664).

The spelling of 22446440 in words is "twenty-two million, four hundred forty-six thousand, four hundred forty".