268207668 has 18 divisors (see below), whose sum is σ = 677969474. Its totient is φ = 89402544.

The previous prime is 268207649. The next prime is 268207673. The reversal of 268207668 is 866702862.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 152473104 + 115734564 = 12348^2 + 10758^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3725071 + ... + 3725142.

Almost surely, 2^268207668 is an apocalyptic number.

It is an amenable number.

268207668 is an abundant number, since it is smaller than the sum of its proper divisors (409761806).

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

268207668 is a wasteful number, since it uses less digits than its factorization.

268207668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7450223 (or 7450218 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 268207668 is about 16377.0469865602. The cubic root of 268207668 is about 644.8970594687.

It can be divided in two parts, 268 and 207668, that added together give a square (207936 = 456²).

The spelling of 268207668 in words is "two hundred sixty-eight million, two hundred seven thousand, six hundred sixty-eight".