191892668 has 24 divisors (see below), whose sum is σ = 387891504. Its totient is φ = 82092800.

The previous prime is 191892667. The next prime is 191892671. The reversal of 191892668 is 866298191.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191892667) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 127523 + ... + 129018.

It is an arithmetic number, because the mean of its divisors is an integer number (16162146).

Almost surely, 2^191892668 is an apocalyptic number.

It is an amenable number.

191892668 is an abundant number, since it is smaller than the sum of its proper divisors (195998836).

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

191892668 is a wasteful number, since it uses less digits than its factorization.

191892668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256573 (or 256571 counting only the distinct ones).

The product of its digits is 373248, while the sum is 50.

The square root of 191892668 is about 13852.5329091831. The cubic root of 191892668 is about 576.7923084110.

The spelling of 191892668 in words is "one hundred ninety-one million, eight hundred ninety-two thousand, six hundred sixty-eight".