268705905 has 32 divisors (see below), whose sum is σ = 464679936. Its totient is φ = 131806464.

The previous prime is 268705901. The next prime is 268705933. The reversal of 268705905 is 509507862.

It is not a de Polignac number, because 268705905 - 2² = 268705901 is a prime.

It is a super-4 number, since 4×268705905⁴ (a number of 35 digits) contains 4444 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (268705901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54784 + ... + 59486.

It is an arithmetic number, because the mean of its divisors is an integer number (14521248).

Almost surely, 2^268705905 is an apocalyptic number.

It is an amenable number.

268705905 is a deficient number, since it is larger than the sum of its proper divisors (195974031).

268705905 is a wasteful number, since it uses less digits than its factorization.

268705905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5017.

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 268705905 is about 16392.2513706934. The cubic root of 268705905 is about 645.2961442796.

The spelling of 268705905 in words is "two hundred sixty-eight million, seven hundred five thousand, nine hundred five".