22446840 has 64 divisors (see below), whose sum is σ = 72525600. Its totient is φ = 5524992.

The previous prime is 22446839. The next prime is 22446859. The reversal of 22446840 is 4864422.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 22446798 and 22446807.

It is a congruent number.

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, 5635 + ... + 8754.

Almost surely, 2^22446840 is an apocalyptic number.

22446840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22446840 is an abundant number, since it is smaller than the sum of its proper divisors (50078760).

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

22446840 is a wasteful number, since it uses less digits than its factorization.

22446840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14416 (or 14412 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

The square root of 22446840 is about 4737.8096204892. The cubic root of 22446840 is about 282.0882978868.

The spelling of 22446840 in words is "twenty-two million, four hundred forty-six thousand, eight hundred forty".