199404 has 36 divisors (see below), whose sum is σ = 524160. Its totient is φ = 63840.

The previous prime is 199403. The next prime is 199411. The reversal of 199404 is 404991.

199404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (199403) 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, 949 + ... + 1139.

It is an arithmetic number, because the mean of its divisors is an integer number (14560).

2¹⁹⁹⁴⁰⁴ 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 199404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262080).

199404 is an abundant number, since it is smaller than the sum of its proper divisors (324756).

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

199404 is a wasteful number, since it uses less digits than its factorization.

199404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 199404 is about 446.5467500722. The cubic root of 199404 is about 58.4222064796.

The spelling of 199404 in words is "one hundred ninety-nine thousand, four hundred four".