285860 has 12 divisors (see below), whose sum is σ = 600348. Its totient is φ = 114336.

The previous prime is 285841. The next prime is 285871. The reversal of 285860 is 68582.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 33856 + 252004 = 184^2 + 502^2 .

It is a congruent number.

It is an unprimeable number.

285860 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, 7127 + ... + 7166.

It is an arithmetic number, because the mean of its divisors is an integer number (50029).

2²⁸⁵⁸⁶⁰ is an apocalyptic number.

285860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285860 is an abundant number, since it is smaller than the sum of its proper divisors (314488).

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

285860 is a wasteful number, since it uses less digits than its factorization.

285860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14302 (or 14300 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 285860 is about 534.6587696840. The cubic root of 285860 is about 65.8745704718.

The spelling of 285860 in words is "two hundred eighty-five thousand, eight hundred sixty".