223506444 has 72 divisors (see below), whose sum is σ = 608631408. Its totient is φ = 63651840.

The previous prime is 223506431. The next prime is 223506487. The reversal of 223506444 is 444605322.

223506444 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 348364 + ... + 349004.

It is an arithmetic number, because the mean of its divisors is an integer number (8453214).

Almost surely, 2^223506444 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 223506444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304315704).

223506444 is an abundant number, since it is smaller than the sum of its proper divisors (385124964).

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

223506444 is a wasteful number, since it uses less digits than its factorization.

223506444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255 (or 1246 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

The square root of 223506444 is about 14950.1319057726. The cubic root of 223506444 is about 606.8714167536.

The spelling of 223506444 in words is "two hundred twenty-three million, five hundred six thousand, four hundred forty-four".