287949868 has 12 divisors (see below), whose sum is σ = 504033712. Its totient is φ = 143940240.

The previous prime is 287949863. The next prime is 287949869. The reversal of 287949868 is 868949782.

It is not an unprimeable number, because it can be changed into a prime (287949863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22246 + ... + 32722.

Almost surely, 2^287949868 is an apocalyptic number.

It is an amenable number.

287949868 is a deficient number, since it is larger than the sum of its proper divisors (216083844).

287949868 is a wasteful number, since it uses less digits than its factorization.

287949868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17352 (or 17350 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 61.

The square root of 287949868 is about 16969.0856559804. The cubic root of 287949868 is about 660.3471299126.

The spelling of 287949868 in words is "two hundred eighty-seven million, nine hundred forty-nine thousand, eight hundred sixty-eight".