191012444 has 48 divisors (see below), whose sum is σ = 401210880. Its totient is φ = 77837760.

The previous prime is 191012443. The next prime is 191012449. The reversal of 191012444 is 444210191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191012443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52649 + ... + 56159.

It is an arithmetic number, because the mean of its divisors is an integer number (8358560).

Almost surely, 2^191012444 is an apocalyptic number.

191012444 is a gapful number since it is divisible by the number (14) 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 191012444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200605440).

191012444 is an abundant number, since it is smaller than the sum of its proper divisors (210198436).

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

191012444 is a wasteful number, since it uses less digits than its factorization.

191012444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3618 (or 3616 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 191012444 is about 13820.7251618719. The cubic root of 191012444 is about 575.9090286822.

The spelling of 191012444 in words is "one hundred ninety-one million, twelve thousand, four hundred forty-four".