268691786 has 16 divisors (see below), whose sum is σ = 454839840. Its totient is φ = 117920880.

The previous prime is 268691767. The next prime is 268691791. The reversal of 268691786 is 687196862.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209936 + ... + 211211.

It is an arithmetic number, because the mean of its divisors is an integer number (28427490).

Almost surely, 2^268691786 is an apocalyptic number.

268691786 is a deficient number, since it is larger than the sum of its proper divisors (186148054).

268691786 is a wasteful number, since it uses less digits than its factorization.

268691786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421189.

The product of its digits is 1741824, while the sum is 53.

The square root of 268691786 is about 16391.8207042415. The cubic root of 268691786 is about 645.2848418412.

The spelling of 268691786 in words is "two hundred sixty-eight million, six hundred ninety-one thousand, seven hundred eighty-six".