223618864 has 40 divisors (see below), whose sum is σ = 499566240. Its totient is φ = 94983168.

The previous prime is 223618859. The next prime is 223618897. The reversal of 223618864 is 468816322.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3822 + ... + 21490.

It is an arithmetic number, because the mean of its divisors is an integer number (12489156).

Almost surely, 2^223618864 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 223618864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249783120).

223618864 is an abundant number, since it is smaller than the sum of its proper divisors (275947376).

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

223618864 is a wasteful number, since it uses less digits than its factorization.

223618864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17797 (or 17791 counting only the distinct ones).

The product of its digits is 110592, while the sum is 40.

The square root of 223618864 is about 14953.8912661554. The cubic root of 223618864 is about 606.9731484204.

The spelling of 223618864 in words is "two hundred twenty-three million, six hundred eighteen thousand, eight hundred sixty-four".