285928 has 16 divisors (see below), whose sum is σ = 542880. Its totient is φ = 141168.

The previous prime is 285871. The next prime is 285937. The reversal of 285928 is 829582.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 285893 and 285902.

It is an unprimeable number.

285928 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, 651 + ... + 997.

It is an arithmetic number, because the mean of its divisors is an integer number (33930).

2²⁸⁵⁹²⁸ is an apocalyptic number.

It is an amenable number.

285928 is a deficient number, since it is larger than the sum of its proper divisors (256952).

285928 is a wasteful number, since it uses less digits than its factorization.

285928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456 (or 452 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 285928 is about 534.7223578643. The cubic root of 285928 is about 65.8797934430.

The spelling of 285928 in words is "two hundred eighty-five thousand, nine hundred twenty-eight".