22663240 has 32 divisors (see below), whose sum is σ = 52373880. Its totient is φ = 8819712.

The previous prime is 22663237. The next prime is 22663241. The reversal of 22663240 is 4236622.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14945956 + 7717284 = 3866^2 + 2778^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22663241) 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, 6177 + ... + 9136.

Almost surely, 2^22663240 is an apocalyptic number.

22663240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22663240 is an abundant number, since it is smaller than the sum of its proper divisors (29710640).

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

22663240 is a wasteful number, since it uses less digits than its factorization.

22663240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15361 (or 15357 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 22663240 is about 4760.5924001116. The cubic root of 22663240 is about 282.9918962831.

Adding to 22663240 its reverse (4236622), we get a palindrome (26899862).

The spelling of 22663240 in words is "twenty-two million, six hundred sixty-three thousand, two hundred forty".