287880866 has 32 divisors (see below), whose sum is σ = 532344960. Its totient is φ = 113700096.

The previous prime is 287880851. The next prime is 287880871. The reversal of 287880866 is 668088782.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177005 + ... + 178623.

It is an arithmetic number, because the mean of its divisors is an integer number (16635780).

Almost surely, 2^287880866 is an apocalyptic number.

287880866 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

287880866 is a deficient number, since it is larger than the sum of its proper divisors (244464094).

287880866 is a wasteful number, since it uses less digits than its factorization.

287880866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2618.

The product of its (nonzero) digits is 2064384, while the sum is 53.

The square root of 287880866 is about 16967.0523662774. The cubic root of 287880866 is about 660.2943789331.

The spelling of 287880866 in words is "two hundred eighty-seven million, eight hundred eighty thousand, eight hundred sixty-six".