22648440 has 64 divisors (see below), whose sum is σ = 69795360. Its totient is φ = 5875200.

The previous prime is 22648427. The next prime is 22648481. The reversal of 22648440 is 4484622.

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 = 22648398 and 22648407.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1890 + ... + 6990.

Almost surely, 2^22648440 is an apocalyptic number.

22648440 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 22648440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34897680).

22648440 is an abundant number, since it is smaller than the sum of its proper divisors (47146920).

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

22648440 is a wasteful number, since it uses less digits than its factorization.

22648440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5152 (or 5148 counting only the distinct ones).

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

The square root of 22648440 is about 4759.0377178585. The cubic root of 22648440 is about 282.9302812021.

The spelling of 22648440 in words is "twenty-two million, six hundred forty-eight thousand, four hundred forty".