268281505 has 16 divisors (see below), whose sum is σ = 341753040. Its totient is φ = 201480192.

The previous prime is 268281493. The next prime is 268281509. The reversal of 268281505 is 505182862.

It can be written as a sum of positive squares in 8 ways, for example, as 25887744 + 242393761 = 5088^2 + 15569^2 .

It is not a de Polignac number, because 268281505 - 2⁵ = 268281473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (268281509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30907 + ... + 38623.

It is an arithmetic number, because the mean of its divisors is an integer number (21359565).

Almost surely, 2^268281505 is an apocalyptic number.

It is an amenable number.

268281505 is a deficient number, since it is larger than the sum of its proper divisors (73471535).

268281505 is a wasteful number, since it uses less digits than its factorization.

268281505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8148.

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 268281505 is about 16379.3011145165. The cubic root of 268281505 is about 644.9562336347.

The spelling of 268281505 in words is "two hundred sixty-eight million, two hundred eighty-one thousand, five hundred five".