287020 has 24 divisors (see below), whose sum is σ = 612864. Its totient is φ = 112896.

The previous prime is 287003. The next prime is 287047. The reversal of 287020 is 20782.

It is an Ulam number.

It is an unprimeable number.

287020 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2197 + ... + 2323.

It is an arithmetic number, because the mean of its divisors is an integer number (25536).

2²⁸⁷⁰²⁰ is an apocalyptic number.

287020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

287020 is an abundant number, since it is smaller than the sum of its proper divisors (325844).

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

287020 is a wasteful number, since it uses less digits than its factorization.

287020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 287020 is about 535.7424754488. The cubic root of 287020 is about 65.9635550243.

The spelling of 287020 in words is "two hundred eighty-seven thousand, twenty".