199444986 has 96 divisors (see below), whose sum is σ = 497257488. Its totient is φ = 57231360.

The previous prime is 199444913. The next prime is 199445009. The reversal of 199444986 is 689444991.

It is a happy number.

199444986 is a `hidden beast` number, since 199 + 4 + 449 + 8 + 6 = 666.

199444986 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 9418761 + 190026225 = 3069^2 + 13785^2 .

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 47 ways as a sum of consecutive naturals, for example, 719880 + ... + 720156.

Almost surely, 2^199444986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199444986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248628744).

199444986 is an abundant number, since it is smaller than the sum of its proper divisors (297812502).

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

199444986 is a wasteful number, since it uses less digits than its factorization.

199444986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496 (or 493 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 199444986 is about 14122.4992830589. The cubic root of 199444986 is about 584.2620895449.

It can be divided in two parts, 19944 and 4986, that multiplied together give a square (99440784 = 9972²).

The spelling of 199444986 in words is "one hundred ninety-nine million, four hundred forty-four thousand, nine hundred eighty-six".