199321408 has 112 divisors (see below), whose sum is σ = 481340160. Its totient is φ = 80640000.

The previous prime is 199321387. The next prime is 199321417. The reversal of 199321408 is 804123991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265033 + ... + 265783.

It is an arithmetic number, because the mean of its divisors is an integer number (4297680).

Almost surely, 2^199321408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199321408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240670080).

199321408 is an abundant number, since it is smaller than the sum of its proper divisors (282018752).

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

199321408 is a wasteful number, since it uses less digits than its factorization.

199321408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816 (or 806 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 199321408 is about 14118.1233880428. The cubic root of 199321408 is about 584.1413931741.

The spelling of 199321408 in words is "one hundred ninety-nine million, three hundred twenty-one thousand, four hundred eight".