191896980 has 96 divisors (see below), whose sum is σ = 588349440. Its totient is φ = 46346880.

The previous prime is 191896967. The next prime is 191897011. The reversal of 191896980 is 89698191.

It is a happy number.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 315837 + ... + 316443.

It is an arithmetic number, because the mean of its divisors is an integer number (6128640).

Almost surely, 2^191896980 is an apocalyptic number.

191896980 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 191896980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294174720).

191896980 is an abundant number, since it is smaller than the sum of its proper divisors (396452460).

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

191896980 is a wasteful number, since it uses less digits than its factorization.

191896980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109 (or 1107 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 51.

The square root of 191896980 is about 13852.6885477152. The cubic root of 191896980 is about 576.7966287251.

The spelling of 191896980 in words is "one hundred ninety-one million, eight hundred ninety-six thousand, nine hundred eighty".