285630 has 16 divisors (see below), whose sum is σ = 685584. Its totient is φ = 76160.

The previous prime is 285629. The next prime is 285631. The reversal of 285630 is 36582.

It is an interprime number because it is at equal distance from previous prime (285629) and next prime (285631).

It is a d-powerful number, because it can be written as 2¹¹ + 8³ + 6⁷ + 5⁵ + 3² + 0 .

It is a Curzon number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 285630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285631) 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, 4731 + ... + 4790.

It is an arithmetic number, because the mean of its divisors is an integer number (42849).

2²⁸⁵⁶³⁰ is an apocalyptic number.

285630 is an abundant number, since it is smaller than the sum of its proper divisors (399954).

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

285630 is a wasteful number, since it uses less digits than its factorization.

285630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9531.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 285630 is about 534.4436359430. The cubic root of 285630 is about 65.8568983986.

The spelling of 285630 in words is "two hundred eighty-five thousand, six hundred thirty".