223443440 has 120 divisors (see below), whose sum is σ = 585993744. Its totient is φ = 79129600.

The previous prime is 223443433. The next prime is 223443491. The reversal of 223443440 is 44344322.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 396599 + ... + 397161.

Almost surely, 2^223443440 is an apocalyptic number.

223443440 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 223443440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292996872).

223443440 is an abundant number, since it is smaller than the sum of its proper divisors (362550304).

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

223443440 is a wasteful number, since it uses less digits than its factorization.

223443440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639 (or 622 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 26.

The square root of 223443440 is about 14948.0246186578. The cubic root of 223443440 is about 606.8143879430.

Adding to 223443440 its reverse (44344322), we get a palindrome (267787762).

The spelling of 223443440 in words is "two hundred twenty-three million, four hundred forty-three thousand, four hundred forty".