268191018 has 24 divisors (see below), whose sum is σ = 581995908. Its totient is φ = 89256192.

The previous prime is 268190987. The next prime is 268191047. The reversal of 268191018 is 810191862.

It can be written as a sum of positive squares in 2 ways, for example, as 254817369 + 13373649 = 15963^2 + 3657^2 .

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, 346 + ... + 23162.

Almost surely, 2^268191018 is an apocalyptic number.

268191018 is an abundant number, since it is smaller than the sum of its proper divisors (313804890).

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

268191018 is a wasteful number, since it uses less digits than its factorization.

268191018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23478 (or 23475 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The square root of 268191018 is about 16376.5386452693. The cubic root of 268191018 is about 644.8837143888.

It can be divided in two parts, 26 and 8191018, that added together give a square (8191044 = 2862²).

The spelling of 268191018 in words is "two hundred sixty-eight million, one hundred ninety-one thousand, eighteen".