287365 has 8 divisors (see below), whose sum is σ = 371448. Its totient is φ = 212160.

The previous prime is 287347. The next prime is 287383. The reversal of 287365 is 563782.

It is an interprime number because it is at equal distance from previous prime (287347) and next prime (287383).

It can be written as a sum of positive squares in 4 ways, for example, as 26244 + 261121 = 162^2 + 511^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 287365 - 2⁵ = 287333 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2⁹ + 8 + 3⁸ + 7³ + 6⁷ + 5 .

It is a Duffinian number.

It is a congruent number.

It is an unprimeable 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, 2146 + ... + 2275.

It is an arithmetic number, because the mean of its divisors is an integer number (46431).

2²⁸⁷³⁶⁵ is an apocalyptic number.

It is an amenable number.

287365 is a deficient number, since it is larger than the sum of its proper divisors (84083).

287365 is a wasteful number, since it uses less digits than its factorization.

287365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4439.

The product of its digits is 10080, while the sum is 31.

The square root of 287365 is about 536.0643618074. The cubic root of 287365 is about 65.9899739897.

The spelling of 287365 in words is "two hundred eighty-seven thousand, three hundred sixty-five".