22490260 has 24 divisors (see below), whose sum is σ = 50863176. Its totient is φ = 8304000.

The previous prime is 22490257. The next prime is 22490287. The reversal of 22490260 is 6209422.

It can be written as a sum of positive squares in 4 ways, for example, as 2669956 + 19820304 = 1634^2 + 4452^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42991 + ... + 43510.

It is an arithmetic number, because the mean of its divisors is an integer number (2119299).

Almost surely, 2^22490260 is an apocalyptic number.

22490260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22490260 is an abundant number, since it is smaller than the sum of its proper divisors (28372916).

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

22490260 is a wasteful number, since it uses less digits than its factorization.

22490260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86523 (or 86521 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 22490260 is about 4742.3896929713. The cubic root of 22490260 is about 282.2700663807.

Adding to 22490260 its reverse (6209422), we get a palindrome (28699682).

The spelling of 22490260 in words is "twenty-two million, four hundred ninety thousand, two hundred sixty".