268991887 has 8 divisors (see below), whose sum is σ = 277156496. Its totient is φ = 260874432.

The previous prime is 268991869. The next prime is 268991893. The reversal of 268991887 is 788199862.

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 268991887 - 2¹¹ = 268989839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268991837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33 + ... + 23194.

It is an arithmetic number, because the mean of its divisors is an integer number (34644562).

Almost surely, 2^268991887 is an apocalyptic number.

268991887 is a deficient number, since it is larger than the sum of its proper divisors (8164609).

268991887 is a wasteful number, since it uses less digits than its factorization.

268991887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23577.

The product of its digits is 3483648, while the sum is 58.

The square root of 268991887 is about 16400.9721358217. The cubic root of 268991887 is about 645.5249913175.

The spelling of 268991887 in words is "two hundred sixty-eight million, nine hundred ninety-one thousand, eight hundred eighty-seven".