22464440 has 32 divisors (see below), whose sum is σ = 51192000. Its totient is φ = 8870784.

The previous prime is 22464413. The next prime is 22464443. The reversal of 22464440 is 4446422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22464443) 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, 395 + ... + 6714.

It is an arithmetic number, because the mean of its divisors is an integer number (1599750).

Almost surely, 2^22464440 is an apocalyptic number.

22464440 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 22464440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25596000).

22464440 is an abundant number, since it is smaller than the sum of its proper divisors (28727560).

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

22464440 is a wasteful number, since it uses less digits than its factorization.

22464440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7199 (or 7195 counting only the distinct ones).

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

The square root of 22464440 is about 4739.6666549453. Note that the first 4 decimals coincide. The cubic root of 22464440 is about 282.1620047282.

The spelling of 22464440 in words is "twenty-two million, four hundred sixty-four thousand, four hundred forty".