22223240 has 32 divisors (see below), whose sum is σ = 53849880. Its totient is φ = 8205312.

The previous prime is 22223239. The next prime is 22223261. The reversal of 22223240 is 4232222.

It can be written as a sum of positive squares in 4 ways, for example, as 16337764 + 5885476 = 4042^2 + 2426^2 .

It is a zygodrome in base 3.

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, 20849 + ... + 21888.

Almost surely, 2^22223240 is an apocalyptic number.

22223240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22223240 is an abundant number, since it is smaller than the sum of its proper divisors (31626640).

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

22223240 is a wasteful number, since it uses less digits than its factorization.

22223240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42761 (or 42757 counting only the distinct ones).

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

The square root of 22223240 is about 4714.1531583096. The cubic root of 22223240 is about 281.1485138368.

Adding to 22223240 its reverse (4232222), we get a palindrome (26455462).

The spelling of 22223240 in words is "twenty-two million, two hundred twenty-three thousand, two hundred forty".