268686378 has 24 divisors (see below), whose sum is σ = 597889188. Its totient is φ = 87141312.

The previous prime is 268686337. The next prime is 268686389. The reversal of 268686378 is 873686862.

It is a happy number.

268686378 is a `hidden beast` number, since 268 + 6 + 8 + 6 + 378 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 268206129 + 480249 = 16377^2 + 693^2 .

It is a Curzon 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, 201051 + ... + 202382.

Almost surely, 2^268686378 is an apocalyptic number.

268686378 is an abundant number, since it is smaller than the sum of its proper divisors (329202810).

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

268686378 is a wasteful number, since it uses less digits than its factorization.

268686378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403478 (or 403475 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The square root of 268686378 is about 16391.6557430908. The cubic root of 268686378 is about 645.2805125638.

The spelling of 268686378 in words is "two hundred sixty-eight million, six hundred eighty-six thousand, three hundred seventy-eight".