191128212 has 216 divisors, whose sum is σ = 588205800. Its totient is φ = 52039680.

The previous prime is 191128207. The next prime is 191128213. The reversal of 191128212 is 212821191.

It can be written as a sum of positive squares in 4 ways, for example, as 27185796 + 163942416 = 5214^2 + 12804^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191128213) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2147464 + ... + 2147552.

It is an arithmetic number, because the mean of its divisors is an integer number (2723175).

Almost surely, 2^191128212 is an apocalyptic number.

191128212 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 191128212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294102900).

191128212 is an abundant number, since it is smaller than the sum of its proper divisors (397077588).

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

191128212 is a wasteful number, since it uses less digits than its factorization.

191128212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 151 counting only the distinct ones).

The product of its digits is 576, while the sum is 27.

The square root of 191128212 is about 13824.9127302851. The cubic root of 191128212 is about 576.0253533400.

The spelling of 191128212 in words is "one hundred ninety-one million, one hundred twenty-eight thousand, two hundred twelve".