268889378 has 4 divisors (see below), whose sum is σ = 403334070. Its totient is φ = 134444688.

The previous prime is 268889351. The next prime is 268889393. The reversal of 268889378 is 873988862.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 140588449 + 128300929 = 11857^2 + 11327^2 .

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 as a sum of consecutive naturals, namely, 67222343 + ... + 67222346.

Almost surely, 2^268889378 is an apocalyptic number.

268889378 is a deficient number, since it is larger than the sum of its proper divisors (134444692).

268889378 is a wasteful number, since it uses less digits than its factorization.

268889378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134444691.

The product of its digits is 9289728, while the sum is 59.

The square root of 268889378 is about 16397.8467488875. The cubic root of 268889378 is about 645.4429807538.

The spelling of 268889378 in words is "two hundred sixty-eight million, eight hundred eighty-nine thousand, three hundred seventy-eight".