199647980 has 24 divisors (see below), whose sum is σ = 479155488. Its totient is φ = 68450688.

The previous prime is 199647961. The next prime is 199648037. The reversal of 199647980 is 89746991.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 712889 + ... + 713168.

It is an arithmetic number, because the mean of its divisors is an integer number (19964812).

Almost surely, 2^199647980 is an apocalyptic number.

199647980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199647980 is an abundant number, since it is smaller than the sum of its proper divisors (279507508).

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

199647980 is a wasteful number, since it uses less digits than its factorization.

199647980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426073 (or 1426071 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 199647980 is about 14129.6843559932. The cubic root of 199647980 is about 584.4602419048.

The spelling of 199647980 in words is "one hundred ninety-nine million, six hundred forty-seven thousand, nine hundred eighty".