22489740 has 144 divisors (see below), whose sum is σ = 84022848. Its totient is φ = 4741632.

The previous prime is 22489721. The next prime is 22489757. The reversal of 22489740 is 4798422.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 22489695 and 22489704.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15694 + ... + 17066.

It is an arithmetic number, because the mean of its divisors is an integer number (583492).

Almost surely, 2^22489740 is an apocalyptic number.

22489740 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 22489740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42011424).

22489740 is an abundant number, since it is smaller than the sum of its proper divisors (61533108).

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

22489740 is a wasteful number, since it uses less digits than its factorization.

22489740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408 (or 1403 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 22489740 is about 4742.3348679738. The cubic root of 22489740 is about 282.2678908972.

The spelling of 22489740 in words is "twenty-two million, four hundred eighty-nine thousand, seven hundred forty".