191947896 has 144 divisors (see below), whose sum is σ = 619950240. Its totient is φ = 53464320.

The previous prime is 191947883. The next prime is 191947979. The reversal of 191947896 is 698749191.

191947896 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 143985 + ... + 145311.

It is an arithmetic number, because the mean of its divisors is an integer number (4305210).

Almost surely, 2^191947896 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 191947896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309975120).

191947896 is an abundant number, since it is smaller than the sum of its proper divisors (428002344).

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

191947896 is a wasteful number, since it uses less digits than its factorization.

191947896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394 (or 1380 counting only the distinct ones).

The product of its digits is 979776, while the sum is 54.

The square root of 191947896 is about 13854.5261918263. The cubic root of 191947896 is about 576.8476380047.

The spelling of 191947896 in words is "one hundred ninety-one million, nine hundred forty-seven thousand, eight hundred ninety-six".