191143944 has 96 divisors (see below), whose sum is σ = 535597920. Its totient is φ = 61544448.

The previous prime is 191143943. The next prime is 191143949. The reversal of 191143944 is 449341191.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 191143899 and 191143908.

It is not an unprimeable number, because it can be changed into a prime (191143943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 330984 + ... + 331560.

It is an arithmetic number, because the mean of its divisors is an integer number (5579145).

Almost surely, 2^191143944 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 191143944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267798960).

191143944 is an abundant number, since it is smaller than the sum of its proper divisors (344453976).

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

191143944 is a wasteful number, since it uses less digits than its factorization.

191143944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739 (or 732 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 191143944 is about 13825.4816914276. The cubic root of 191143944 is about 576.0411573600.

The spelling of 191143944 in words is "one hundred ninety-one million, one hundred forty-three thousand, nine hundred forty-four".