191428334 has 8 divisors (see below), whose sum is σ = 287203080. Its totient is φ = 95693976.

The previous prime is 191428277. The next prime is 191428337. The reversal of 191428334 is 433824191.

191428334 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 191428294 and 191428303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191428337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8912 + ... + 21500.

It is an arithmetic number, because the mean of its divisors is an integer number (35900385).

Almost surely, 2^191428334 is an apocalyptic number.

191428334 is a deficient number, since it is larger than the sum of its proper divisors (95774746).

191428334 is a wasteful number, since it uses less digits than its factorization.

191428334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20194.

The product of its digits is 20736, while the sum is 35.

The square root of 191428334 is about 13835.7628629577. The cubic root of 191428334 is about 576.3266998726.

The spelling of 191428334 in words is "one hundred ninety-one million, four hundred twenty-eight thousand, three hundred thirty-four".