223645448 has 48 divisors (see below), whose sum is σ = 467883780. Its totient is φ = 99622656.

The previous prime is 223645423. The next prime is 223645453. The reversal of 223645448 is 844546322.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 66945124 + 156700324 = 8182^2 + 12518^2 .

It is a super-2 number, since 2×223645448² = 100034572822241408, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86186 + ... + 88742.

Almost surely, 2^223645448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 223645448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233941890).

223645448 is an abundant number, since it is smaller than the sum of its proper divisors (244238332).

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

223645448 is a wasteful number, since it uses less digits than its factorization.

223645448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2634 (or 2601 counting only the distinct ones).

The product of its digits is 184320, while the sum is 38.

The square root of 223645448 is about 14954.7801053710. The cubic root of 223645448 is about 606.9971999614.

The spelling of 223645448 in words is "two hundred twenty-three million, six hundred forty-five thousand, four hundred forty-eight".