287122866 has 16 divisors (see below), whose sum is σ = 574440384. Its totient is φ = 95675184.

The previous prime is 287122841. The next prime is 287122883. The reversal of 287122866 is 668221782.

It is a happy number.

It is an unprimeable number.

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, 17091 + ... + 29433.

It is an arithmetic number, because the mean of its divisors is an integer number (35902524).

Almost surely, 2^287122866 is an apocalyptic number.

287122866 is an abundant number, since it is smaller than the sum of its proper divisors (287317518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

287122866 is a wasteful number, since it uses less digits than its factorization.

287122866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16225.

The product of its digits is 129024, while the sum is 42.

The square root of 287122866 is about 16944.7002334063. The cubic root of 287122866 is about 659.7143437836.

The spelling of 287122866 in words is "two hundred eighty-seven million, one hundred twenty-two thousand, eight hundred sixty-six".