191288068 has 12 divisors (see below), whose sum is σ = 335003200. Its totient is φ = 95572872.

The previous prime is 191288059. The next prime is 191288081. The reversal of 191288068 is 860882191.

It is a super-2 number, since 2×191288068² = 73182249918345248, which contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 11496 + ... + 22687.

Almost surely, 2^191288068 is an apocalyptic number.

It is an amenable number.

191288068 is a deficient number, since it is larger than the sum of its proper divisors (143715132).

191288068 is a wasteful number, since it uses less digits than its factorization.

191288068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35586 (or 35584 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 43.

The square root of 191288068 is about 13830.6929689007. The cubic root of 191288068 is about 576.1859008040.

The spelling of 191288068 in words is "one hundred ninety-one million, two hundred eighty-eight thousand, sixty-eight".