285276 has 12 divisors (see below), whose sum is σ = 665672. Its totient is φ = 95088.

The previous prime is 285251. The next prime is 285281. The reversal of 285276 is 672582.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×285276³ = 69649333354513728, which contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

285276 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11875 + ... + 11898.

2²⁸⁵²⁷⁶ is an apocalyptic number.

It is an amenable number.

285276 is an abundant number, since it is smaller than the sum of its proper divisors (380396).

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

285276 is a wasteful number, since it uses less digits than its factorization.

285276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23780 (or 23778 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 285276 is about 534.1123477322. The cubic root of 285276 is about 65.8296802260.

It can be divided in two parts, 285 and 276, that added together give a triangular number (561 = T₃₃).

The spelling of 285276 in words is "two hundred eighty-five thousand, two hundred seventy-six".