285028 has 6 divisors (see below), whose sum is σ = 498806. Its totient is φ = 142512.

The previous prime is 285023. The next prime is 285031. The reversal of 285028 is 820582.

It can be written as a sum of positive squares in only one way, i.e., 272484 + 12544 = 522^2 + 112^2 .

It is a junction number, because it is equal to n+sod(n) for n = 284993 and 285011.

It is not an unprimeable number, because it can be changed into a prime (285023) by changing a digit.

285028 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 as a sum of consecutive naturals, namely, 35625 + ... + 35632.

2²⁸⁵⁰²⁸ is an apocalyptic number.

It is an amenable number.

285028 is a deficient number, since it is larger than the sum of its proper divisors (213778).

285028 is a wasteful number, since it uses less digits than its factorization.

285028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71261 (or 71259 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 285028 is about 533.8801363602. The cubic root of 285028 is about 65.8105987122.

It can be divided in two parts, 2850 and 28, that multiplied together give a triangular number (79800 = T₃₉₉).

The spelling of 285028 in words is "two hundred eighty-five thousand, twenty-eight".