223649864 has 8 divisors (see below), whose sum is σ = 419343510. Its totient is φ = 111824928.

The previous prime is 223649863. The next prime is 223649911. The reversal of 223649864 is 468946322.

It can be written as a sum of positive squares in only one way, i.e., 211469764 + 12180100 = 14542^2 + 3490^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (223649863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13978109 + ... + 13978124.

Almost surely, 2^223649864 is an apocalyptic number.

It is an amenable number.

223649864 is a deficient number, since it is larger than the sum of its proper divisors (195693646).

223649864 is a wasteful number, since it uses less digits than its factorization.

223649864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27956239 (or 27956235 counting only the distinct ones).

The product of its digits is 497664, while the sum is 44.

The square root of 223649864 is about 14954.9277497419. The cubic root of 223649864 is about 607.0011950975.

The spelling of 223649864 in words is "two hundred twenty-three million, six hundred forty-nine thousand, eight hundred sixty-four".