22230440 has 16 divisors (see below), whose sum is σ = 50018580. Its totient is φ = 8892160.

The previous prime is 22230421. The next prime is 22230463. The reversal of 22230440 is 4403222.

It can be written as a sum of positive squares in 2 ways, for example, as 21548164 + 682276 = 4642^2 + 826^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277841 + ... + 277920.

Almost surely, 2^22230440 is an apocalyptic number.

22230440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22230440 is an abundant number, since it is smaller than the sum of its proper divisors (27788140).

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

22230440 is a wasteful number, since it uses less digits than its factorization.

22230440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555772 (or 555768 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 22230440 is about 4714.9167543022. The cubic root of 22230440 is about 281.1788732073.

Adding to 22230440 its reverse (4403222), we get a palindrome (26633662).

The spelling of 22230440 in words is "twenty-two million, two hundred thirty thousand, four hundred forty".