191226838 has 16 divisors (see below), whose sum is σ = 313185024. Its totient is φ = 86846760.

The previous prime is 191226803. The next prime is 191226839. The reversal of 191226838 is 838622191.

It is a self number, because there is not a number n which added to its sum of digits gives 191226838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191226839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28831 + ... + 34837.

It is an arithmetic number, because the mean of its divisors is an integer number (19574064).

Almost surely, 2^191226838 is an apocalyptic number.

191226838 is a deficient number, since it is larger than the sum of its proper divisors (121958186).

191226838 is a wasteful number, since it uses less digits than its factorization.

191226838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7467.

The product of its digits is 41472, while the sum is 40.

The square root of 191226838 is about 13828.4792367057. The cubic root of 191226838 is about 576.1244165235.

The spelling of 191226838 in words is "one hundred ninety-one million, two hundred twenty-six thousand, eight hundred thirty-eight".