22490520 has 96 divisors (see below), whose sum is σ = 73126800. Its totient is φ = 5531136.

The previous prime is 22490467. The next prime is 22490521. The reversal of 22490520 is 2509422.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22490521) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 19726 + ... + 20834.

Almost surely, 2^22490520 is an apocalyptic number.

22490520 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 22490520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36563400).

22490520 is an abundant number, since it is smaller than the sum of its proper divisors (50636280).

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

22490520 is a wasteful number, since it uses less digits than its factorization.

22490520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149 (or 1132 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 22490520 is about 4742.4171052323. The cubic root of 22490520 is about 282.2711541098.

Adding to 22490520 its reverse (2509422), we get a palindrome (24999942).

The spelling of 22490520 in words is "twenty-two million, four hundred ninety thousand, five hundred twenty".