199995912 has 64 divisors (see below), whose sum is σ = 556992000. Its totient is φ = 66491712.

The previous prime is 199995889. The next prime is 199995923. The reversal of 199995912 is 219599991.

199995912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102498 + ... + 104430.

It is an arithmetic number, because the mean of its divisors is an integer number (8703000).

Almost surely, 2^199995912 is an apocalyptic number.

199995912 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 199995912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278496000).

199995912 is an abundant number, since it is smaller than the sum of its proper divisors (356996088).

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

199995912 is a wasteful number, since it uses less digits than its factorization.

199995912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2427 (or 2417 counting only the distinct ones).

The product of its digits is 590490, while the sum is 54.

The square root of 199995912 is about 14141.9910903663. The cubic root of 199995912 is about 584.7995631539.

The spelling of 199995912 in words is "one hundred ninety-nine million, nine hundred ninety-five thousand, nine hundred twelve".