287870 has 16 divisors (see below), whose sum is σ = 565488. Its totient is φ = 104640.

The previous prime is 287867. The next prime is 287873. The reversal of 287870 is 78782.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (287867) and next prime (287873).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 287870.

It is not an unprimeable number, because it can be changed into a prime (287873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1199 + ... + 1418.

It is an arithmetic number, because the mean of its divisors is an integer number (35343).

2²⁸⁷⁸⁷⁰ is an apocalyptic number.

287870 is a deficient number, since it is larger than the sum of its proper divisors (277618).

287870 is a wasteful number, since it uses less digits than its factorization.

287870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2635.

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 287870 is about 536.5351805800. The cubic root of 287870 is about 66.0286071273.

The spelling of 287870 in words is "two hundred eighty-seven thousand, eight hundred seventy".