287678864 has 40 divisors (see below), whose sum is σ = 609469920. Its totient is φ = 130457600.

The previous prime is 287678857. The next prime is 287678893. The reversal of 287678864 is 468876782.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84752 + ... + 88080.

It is an arithmetic number, because the mean of its divisors is an integer number (15236748).

Almost surely, 2^287678864 is an apocalyptic number.

It is an amenable number.

287678864 is an abundant number, since it is smaller than the sum of its proper divisors (321791056).

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

287678864 is a wasteful number, since it uses less digits than its factorization.

287678864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3839 (or 3833 counting only the distinct ones).

The product of its digits is 7225344, while the sum is 56.

The square root of 287678864 is about 16961.0985493275. The cubic root of 287678864 is about 660.1399030020.

The spelling of 287678864 in words is "two hundred eighty-seven million, six hundred seventy-eight thousand, eight hundred sixty-four".