199409112 has 96 divisors (see below), whose sum is σ = 637178880. Its totient is φ = 55131840.

The previous prime is 199409107. The next prime is 199409141. The reversal of 199409112 is 211904991.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9243 + ... + 22005.

It is an arithmetic number, because the mean of its divisors is an integer number (6637280).

Almost surely, 2^199409112 is an apocalyptic number.

199409112 is a gapful number since it is divisible by the number (12) 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 199409112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318589440).

199409112 is an abundant number, since it is smaller than the sum of its proper divisors (437769768).

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

199409112 is a wasteful number, since it uses less digits than its factorization.

199409112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12813 (or 12806 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 199409112 is about 14121.2291249735. The cubic root of 199409112 is about 584.2270572027.

The spelling of 199409112 in words is "one hundred ninety-nine million, four hundred nine thousand, one hundred twelve".