199987080 has 32 divisors (see below), whose sum is σ = 599961600. Its totient is φ = 53329856.

The previous prime is 199987063. The next prime is 199987087. The reversal of 199987080 is 80789991.

It is not an unprimeable number, because it can be changed into a prime (199987087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 833160 + ... + 833399.

It is an arithmetic number, because the mean of its divisors is an integer number (18748800).

Almost surely, 2^199987080 is an apocalyptic number.

199987080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199987080 is an abundant number, since it is smaller than the sum of its proper divisors (399974520).

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

199987080 is a wasteful number, since it uses less digits than its factorization.

199987080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666573 (or 1666569 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 51.

The square root of 199987080 is about 14141.6788253729. The cubic root of 199987080 is about 584.7909546017.

The spelling of 199987080 in words is "one hundred ninety-nine million, nine hundred eighty-seven thousand, eighty".