191798012 has 48 divisors (see below), whose sum is σ = 423843840. Its totient is φ = 73996032.

The previous prime is 191797993. The next prime is 191798071. The reversal of 191798012 is 210897191.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2189 + ... + 19707.

It is an arithmetic number, because the mean of its divisors is an integer number (8830080).

Almost surely, 2^191798012 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 191798012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211921920).

191798012 is an abundant number, since it is smaller than the sum of its proper divisors (232045828).

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

191798012 is a wasteful number, since it uses less digits than its factorization.

191798012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17570 (or 17568 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 38.

The square root of 191798012 is about 13849.1159284627. The cubic root of 191798012 is about 576.6974535930.

The spelling of 191798012 in words is "one hundred ninety-one million, seven hundred ninety-eight thousand, twelve".