223856958 has 64 divisors (see below), whose sum is σ = 496419840. Its totient is φ = 66867072.

The previous prime is 223856957. The next prime is 223857013. The reversal of 223856958 is 859658322.

It is a super-2 number, since 2×223856958² = 100223875290027528, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223856951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 832048 + ... + 832316.

It is an arithmetic number, because the mean of its divisors is an integer number (7756560).

Almost surely, 2^223856958 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 223856958, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248209920).

223856958 is an abundant number, since it is smaller than the sum of its proper divisors (272562882).

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

223856958 is a wasteful number, since it uses less digits than its factorization.

223856958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561.

The product of its digits is 1036800, while the sum is 48.

The square root of 223856958 is about 14961.8500861357. The cubic root of 223856958 is about 607.1884931101.

The spelling of 223856958 in words is "two hundred twenty-three million, eight hundred fifty-six thousand, nine hundred fifty-eight".