199403568 has 120 divisors (see below), whose sum is σ = 686879648. Its totient is φ = 52586496.

The previous prime is 199403551. The next prime is 199403569. The reversal of 199403568 is 865304991.

It is a happy number.

199403568 is a `hidden beast` number, since 199 + 403 + 56 + 8 = 666.

199403568 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×199403568² = 79523565862261248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (199403569) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5496 + ... + 20712.

Almost surely, 2^199403568 is an apocalyptic number.

199403568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199403568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343439824).

199403568 is an abundant number, since it is smaller than the sum of its proper divisors (487476080).

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

199403568 is a wasteful number, since it uses less digits than its factorization.

199403568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15251 (or 15242 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 199403568 is about 14121.0328234163. The cubic root of 199403568 is about 584.2216428984.

The spelling of 199403568 in words is "one hundred ninety-nine million, four hundred three thousand, five hundred sixty-eight".