268891775 has 12 divisors (see below), whose sum is σ = 333738312. Its totient is φ = 214911840.

The previous prime is 268891769. The next prime is 268891787. The reversal of 268891775 is 577198862.

It is a de Polignac number, because none of the positive numbers 2^k-268891775 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25892 + ... + 34758.

It is an arithmetic number, because the mean of its divisors is an integer number (27811526).

Almost surely, 2^268891775 is an apocalyptic number.

268891775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

268891775 is a deficient number, since it is larger than the sum of its proper divisors (64846537).

268891775 is a wasteful number, since it uses less digits than its factorization.

268891775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10090 (or 10085 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 53.

The square root of 268891775 is about 16397.9198375892. The cubic root of 268891775 is about 645.4448986704. Note that the first 3 decimals are identical.

The spelling of 268891775 in words is "two hundred sixty-eight million, eight hundred ninety-one thousand, seven hundred seventy-five".