223433440 has 48 divisors (see below), whose sum is σ = 529230240. Its totient is φ = 89141760.

The previous prime is 223433393. The next prime is 223433447. The reversal of 223433440 is 44334322.

It is a super-2 number, since 2×223433440² = 99845004220467200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223433447) 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, 68650 + ... + 71830.

It is an arithmetic number, because the mean of its divisors is an integer number (11025630).

Almost surely, 2^223433440 is an apocalyptic number.

223433440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223433440 is an abundant number, since it is smaller than the sum of its proper divisors (305796800).

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

223433440 is a wasteful number, since it uses less digits than its factorization.

223433440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3635 (or 3627 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 25.

The square root of 223433440 is about 14947.6901225574. The cubic root of 223433440 is about 606.8053353398.

Adding to 223433440 its reverse (44334322), we get a palindrome (267767762).

The spelling of 223433440 in words is "two hundred twenty-three million, four hundred thirty-three thousand, four hundred forty".