199805004 has 72 divisors (see below), whose sum is σ = 590670080. Its totient is φ = 55756512.

The previous prime is 199805003. The next prime is 199805009. The reversal of 199805004 is 400508991.

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

It is a self number, because there is not a number n which added to its sum of digits gives 199805004.

It is not an unprimeable number, because it can be changed into a prime (199805003) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1617 + ... + 20055.

Almost surely, 2^199805004 is an apocalyptic number.

199805004 is a gapful number since it is divisible by the number (14) 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 199805004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295335040).

199805004 is an abundant number, since it is smaller than the sum of its proper divisors (390865076).

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

199805004 is a wasteful number, since it uses less digits than its factorization.

199805004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18499 (or 18494 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 199805004 is about 14135.2397928015. The cubic root of 199805004 is about 584.6134285875.

The spelling of 199805004 in words is "one hundred ninety-nine million, eight hundred five thousand, four".