191047680 has 192 divisors, whose sum is σ = 680097600. Its totient is φ = 50872320.

The previous prime is 191047673. The next prime is 191047691. The reversal of 191047680 is 86740191.

It is a tau number, because it is divible by the number of its divisors (192).

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

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, 276135 + ... + 276825.

It is an arithmetic number, because the mean of its divisors is an integer number (3542175).

Almost surely, 2^191047680 is an apocalyptic number.

191047680 is a gapful number since it is divisible by the number (10) 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 191047680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340048800).

191047680 is an abundant number, since it is smaller than the sum of its proper divisors (489049920).

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

191047680 is an equidigital number, since it uses as much as digits as its factorization.

191047680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727 (or 701 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 191047680 is about 13821.9998553031. Note that the first 3 decimals coincide. The cubic root of 191047680 is about 575.9444390852.

The spelling of 191047680 in words is "one hundred ninety-one million, forty-seven thousand, six hundred eighty".