191406834 has 64 divisors (see below), whose sum is σ = 443520000. Its totient is φ = 61119360.

The previous prime is 191406829. The next prime is 191406847. The reversal of 191406834 is 438604191.

191406834 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×191406834² = 73273152203807112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 181942 + ... + 182990.

It is an arithmetic number, because the mean of its divisors is an integer number (6930000).

Almost surely, 2^191406834 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191406834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221760000).

191406834 is an abundant number, since it is smaller than the sum of its proper divisors (252113166).

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

191406834 is a wasteful number, since it uses less digits than its factorization.

191406834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200 (or 1194 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 191406834 is about 13834.9858691652. The cubic root of 191406834 is about 576.3051226280.

The spelling of 191406834 in words is "one hundred ninety-one million, four hundred six thousand, eight hundred thirty-four".