191027844 has 216 divisors, whose sum is σ = 609697088. Its totient is φ = 49351680.

The previous prime is 191027807. The next prime is 191027867. The reversal of 191027844 is 448720191.

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

It is a junction number, because it is equal to n+sod(n) for n = 191027799 and 191027808.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3131574 + ... + 3131634.

Almost surely, 2^191027844 is an apocalyptic number.

191027844 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 191027844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304848544).

191027844 is an abundant number, since it is smaller than the sum of its proper divisors (418669244).

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

191027844 is a wasteful number, since it uses less digits than its factorization.

191027844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 191027844 is about 13821.2822849401. The cubic root of 191027844 is about 575.9245054412.

The spelling of 191027844 in words is "one hundred ninety-one million, twenty-seven thousand, eight hundred forty-four".