268186891 has 8 divisors (see below), whose sum is σ = 306758144. Its totient is φ = 229680360.

The previous prime is 268186873. The next prime is 268186907. The reversal of 268186891 is 198681862.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 268186891 - 2¹³ = 268178699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (268186811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6945 + ... + 24178.

It is an arithmetic number, because the mean of its divisors is an integer number (38344768).

Almost surely, 2^268186891 is an apocalyptic number.

268186891 is a deficient number, since it is larger than the sum of its proper divisors (38571253).

268186891 is a wasteful number, since it uses less digits than its factorization.

268186891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32361.

The product of its digits is 331776, while the sum is 49.

The square root of 268186891 is about 16376.4126413571. The cubic root of 268186891 is about 644.8804064869.

The spelling of 268186891 in words is "two hundred sixty-eight million, one hundred eighty-six thousand, eight hundred ninety-one".