191133940 has 24 divisors (see below), whose sum is σ = 401732352. Its totient is φ = 76386720.

The previous prime is 191133937. The next prime is 191133947. The reversal of 191133940 is 49331191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191133947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23845 + ... + 30835.

It is an arithmetic number, because the mean of its divisors is an integer number (16738848).

Almost surely, 2^191133940 is an apocalyptic number.

191133940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191133940 is an abundant number, since it is smaller than the sum of its proper divisors (210598412).

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

191133940 is a wasteful number, since it uses less digits than its factorization.

191133940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8367 (or 8365 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 191133940 is about 13825.1198909811. The cubic root of 191133940 is about 576.0311076628.

The spelling of 191133940 in words is "one hundred ninety-one million, one hundred thirty-three thousand, nine hundred forty".