285670 has 48 divisors (see below), whose sum is σ = 664848. Its totient is φ = 87360.

The previous prime is 285667. The next prime is 285673. The reversal of 285670 is 76582.

It is an interprime number because it is at equal distance from previous prime (285667) and next prime (285673).

It is a d-powerful number, because it can be written as 2¹¹ + 8³ + 6⁷ + 5⁵ + 7² + 0 .

It is a plaindrome in base 15.

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5364 + ... + 5416.

It is an arithmetic number, because the mean of its divisors is an integer number (13851).

2²⁸⁵⁶⁷⁰ is an apocalyptic number.

285670 is an abundant number, since it is smaller than the sum of its proper divisors (379178).

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

285670 is a wasteful number, since it uses less digits than its factorization.

285670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 285670 is about 534.4810567270. The cubic root of 285670 is about 65.8599724839.

It can be divided in two parts, 2856 and 70, that added together give a triangular number (2926 = T₇₆).

The spelling of 285670 in words is "two hundred eighty-five thousand, six hundred seventy".