287488 has 18 divisors (see below), whose sum is σ = 574364. Its totient is φ = 143616.

The previous prime is 287449. The next prime is 287491. The reversal of 287488 is 884782.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306 + ... + 817.

287488 is a Friedman number, since it can be written as (8*8+2)^(7-4)-8, using all its digits and the basic arithmetic operations.

2²⁸⁷⁴⁸⁸ is an apocalyptic number.

It is an amenable number.

287488 is a deficient number, since it is larger than the sum of its proper divisors (286876).

287488 is an equidigital number, since it uses as much as digits as its factorization.

287488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139 (or 1125 counting only the distinct ones).

The product of its digits is 28672, while the sum is 37.

The square root of 287488 is about 536.1790745637. The cubic root of 287488 is about 65.9993878119. Note that the first 3 decimals are identical.

The spelling of 287488 in words is "two hundred eighty-seven thousand, four hundred eighty-eight".