268367781 has 16 divisors (see below), whose sum is σ = 392344128. Its totient is φ = 161817600.

The previous prime is 268367767. The next prime is 268367833. The reversal of 268367781 is 187763862.

It is not a de Polignac number, because 268367781 - 2¹⁵ = 268335013 is a prime.

It is a super-2 number, since 2×268367781² = 144042531757727922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 268367781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268367741) 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, 14140 + ... + 27141.

It is an arithmetic number, because the mean of its divisors is an integer number (24521508).

Almost surely, 2^268367781 is an apocalyptic number.

It is an amenable number.

268367781 is a deficient number, since it is larger than the sum of its proper divisors (123976347).

268367781 is a wasteful number, since it uses less digits than its factorization.

268367781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41492.

The product of its digits is 677376, while the sum is 48.

The square root of 268367781 is about 16381.9345927152. The cubic root of 268367781 is about 645.0253628630.

The spelling of 268367781 in words is "two hundred sixty-eight million, three hundred sixty-seven thousand, seven hundred eighty-one".