285387 has 8 divisors (see below), whose sum is σ = 383040. Its totient is φ = 189000.

The previous prime is 285377. The next prime is 285421. The reversal of 285387 is 783582.

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

It is not a de Polignac number, because 285387 - 2¹² = 281291 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 8⁴ + 3⁷ + 5² + 8⁶ + 7⁵ .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 285387.

It is not an unprimeable number, because it can be changed into a prime (285317) 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, 564 + ... + 942.

It is an arithmetic number, because the mean of its divisors is an integer number (47880).

2²⁸⁵³⁸⁷ is an apocalyptic number.

285387 is a deficient number, since it is larger than the sum of its proper divisors (97653).

285387 is a wasteful number, since it uses less digits than its factorization.

285387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633.

The product of its digits is 13440, while the sum is 33.

The square root of 285387 is about 534.2162483489. The cubic root of 285387 is about 65.8382171598.

The spelling of 285387 in words is "two hundred eighty-five thousand, three hundred eighty-seven".