285270 has 32 divisors (see below), whose sum is σ = 705888. Its totient is φ = 73728.

The previous prime is 285251. The next prime is 285281. The reversal of 285270 is 72582.

It is a self number, because there is not a number n which added to its sum of digits gives 285270.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 982 + ... + 1238.

It is an arithmetic number, because the mean of its divisors is an integer number (22059).

2²⁸⁵²⁷⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352944).

285270 is an abundant number, since it is smaller than the sum of its proper divisors (420618).

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

285270 is a wasteful number, since it uses less digits than its factorization.

285270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 285270 is about 534.1067309068. The cubic root of 285270 is about 65.8292187070.

It can be divided in two parts, 285 and 270, that added together give a palindrome (555).

The spelling of 285270 in words is "two hundred eighty-five thousand, two hundred seventy".