199960728 has 96 divisors (see below), whose sum is σ = 564632880. Its totient is φ = 58924800.

The previous prime is 199960727. The next prime is 199960729. The reversal of 199960728 is 827069991.

It is a happy number.

199960728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (199960727) and next prime (199960729).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199960723) 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, 106518 + ... + 108378.

Almost surely, 2^199960728 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 199960728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282316440).

199960728 is an abundant number, since it is smaller than the sum of its proper divisors (364672152).

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

199960728 is a wasteful number, since it uses less digits than its factorization.

199960728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1929 (or 1914 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 51.

The square root of 199960728 is about 14140.7470806885. The cubic root of 199960728 is about 584.7652677954.

The spelling of 199960728 in words is "one hundred ninety-nine million, nine hundred sixty thousand, seven hundred twenty-eight".