199408392 has 80 divisors (see below), whose sum is σ = 573692460. Its totient is φ = 64665216.

The previous prime is 199408381. The next prime is 199408397. The reversal of 199408392 is 293804991.

199408392 is digitally balanced in base 2, 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 2 ways, for example, as 144144036 + 55264356 = 12006^2 + 7434^2 .

It is not an unprimeable number, because it can be changed into a prime (199408397) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19818 + ... + 28134.

Almost surely, 2^199408392 is an apocalyptic number.

199408392 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 199408392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286846230).

199408392 is an abundant number, since it is smaller than the sum of its proper divisors (374284068).

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

199408392 is a wasteful number, since it uses less digits than its factorization.

199408392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8372 (or 8359 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 199408392 is about 14121.2036314190. The cubic root of 199408392 is about 584.2263540520.

The spelling of 199408392 in words is "one hundred ninety-nine million, four hundred eight thousand, three hundred ninety-two".