199238436 has 144 divisors (see below), whose sum is σ = 558702144. Its totient is φ = 59609088.

The previous prime is 199238407. The next prime is 199238437. The reversal of 199238436 is 634832991.

It is a happy number.

199238436 is a `hidden beast` number, since 199 + 23 + 8 + 436 = 666.

199238436 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 199238391 and 199238400.

It is not an unprimeable number, because it can be changed into a prime (199238437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1763116 + ... + 1763228.

It is an arithmetic number, because the mean of its divisors is an integer number (3879876).

Almost surely, 2^199238436 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 199238436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279351072).

199238436 is an abundant number, since it is smaller than the sum of its proper divisors (359463708).

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

199238436 is a wasteful number, since it uses less digits than its factorization.

199238436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250 (or 245 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 199238436 is about 14115.1845896538. The cubic root of 199238436 is about 584.0603279456.

The spelling of 199238436 in words is "one hundred ninety-nine million, two hundred thirty-eight thousand, four hundred thirty-six".