268489787 has 4 divisors (see below), whose sum is σ = 280163280. Its totient is φ = 256816296.

The previous prime is 268489783. The next prime is 268489799. The reversal of 268489787 is 787984862.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 268489787 - 2² = 268489783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268489783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5836712 + ... + 5836757.

It is an arithmetic number, because the mean of its divisors is an integer number (70040820).

Almost surely, 2^268489787 is an apocalyptic number.

268489787 is a deficient number, since it is larger than the sum of its proper divisors (11673493).

268489787 is a wasteful number, since it uses less digits than its factorization.

268489787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11673492.

The product of its digits is 10838016, while the sum is 59.

The square root of 268489787 is about 16385.6579666488. The cubic root of 268489787 is about 645.1230957097.

The spelling of 268489787 in words is "two hundred sixty-eight million, four hundred eighty-nine thousand, seven hundred eighty-seven".