199823568 has 160 divisors (see below), whose sum is σ = 616032000. Its totient is φ = 55770624.

The previous prime is 199823549. The next prime is 199823587. The reversal of 199823568 is 865328991.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (199823549) and next prime (199823587).

It is a self number, because there is not a number n which added to its sum of digits gives 199823568.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 872478 + ... + 872706.

It is an arithmetic number, because the mean of its divisors is an integer number (3850200).

Almost surely, 2^199823568 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 199823568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308016000).

199823568 is an abundant number, since it is smaller than the sum of its proper divisors (416208432).

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

199823568 is a wasteful number, since it uses less digits than its factorization.

199823568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 294 counting only the distinct ones).

The product of its digits is 933120, while the sum is 51.

The square root of 199823568 is about 14135.8964342556. The cubic root of 199823568 is about 584.6315336188.

The spelling of 199823568 in words is "one hundred ninety-nine million, eight hundred twenty-three thousand, five hundred sixty-eight".