268890568 has 8 divisors (see below), whose sum is σ = 504169830. Its totient is φ = 134445280.

The previous prime is 268890563. The next prime is 268890569. The reversal of 268890568 is 865098862.

It can be written as a sum of positive squares in only one way, i.e., 253382724 + 15507844 = 15918^2 + 3938^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (268890563) by changing a digit.

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 as a sum of consecutive naturals, namely, 16805653 + ... + 16805668.

Almost surely, 2^268890568 is an apocalyptic number.

It is an amenable number.

268890568 is a deficient number, since it is larger than the sum of its proper divisors (235279262).

268890568 is a wasteful number, since it uses less digits than its factorization.

268890568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33611327 (or 33611323 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 52.

The square root of 268890568 is about 16397.8830340992. The cubic root of 268890568 is about 645.4439329124.

The spelling of 268890568 in words is "two hundred sixty-eight million, eight hundred ninety thousand, five hundred sixty-eight".