223640168 has 16 divisors (see below), whose sum is σ = 443991780. Its totient is φ = 105242368.

The previous prime is 223640143. The next prime is 223640227. The reversal of 223640168 is 861046322.

223640168 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 207302404 + 16337764 = 14398^2 + 4042^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 822071 + ... + 822342.

Almost surely, 2^223640168 is an apocalyptic number.

It is an amenable number.

223640168 is a deficient number, since it is larger than the sum of its proper divisors (220351612).

223640168 is a wasteful number, since it uses less digits than its factorization.

223640168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644436 (or 1644432 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 223640168 is about 14954.6035721446. The cubic root of 223640168 is about 606.9924230992.

The spelling of 223640168 in words is "two hundred twenty-three million, six hundred forty thousand, one hundred sixty-eight".