268388281 has 8 divisors (see below), whose sum is σ = 322873280. Its totient is φ = 217939248.

The previous prime is 268388279. The next prime is 268388317. The reversal of 268388281 is 182883862.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 268388281 - 2¹ = 268388279 is a prime.

It is a super-2 number, since 2×268388281² = 144064538756269922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268388251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1008846 + ... + 1009111.

It is an arithmetic number, because the mean of its divisors is an integer number (40359160).

Almost surely, 2^268388281 is an apocalyptic number.

It is an amenable number.

268388281 is a deficient number, since it is larger than the sum of its proper divisors (54484999).

268388281 is a wasteful number, since it uses less digits than its factorization.

268388281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2017983.

The product of its digits is 294912, while the sum is 46.

The square root of 268388281 is about 16382.5602699944. The cubic root of 268388281 is about 645.0417864481.

The spelling of 268388281 in words is "two hundred sixty-eight million, three hundred eighty-eight thousand, two hundred eighty-one".