199010988 has 36 divisors (see below), whose sum is σ = 548788968. Its totient is φ = 60306240.

The previous prime is 199010983. The next prime is 199010989. The reversal of 199010988 is 889010991.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×199010988² = 79210746689472288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (199010983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250881 + ... + 251672.

It is an arithmetic number, because the mean of its divisors is an integer number (15244138).

Almost surely, 2^199010988 is an apocalyptic number.

199010988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

199010988 is an abundant number, since it is smaller than the sum of its proper divisors (349777980).

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

199010988 is a wasteful number, since it uses less digits than its factorization.

199010988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502574 (or 502569 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 45.

The square root of 199010988 is about 14107.1254336240. The cubic root of 199010988 is about 583.8379914344.

The spelling of 199010988 in words is "one hundred ninety-nine million, ten thousand, nine hundred eighty-eight".