285556 has 6 divisors (see below), whose sum is σ = 499730. Its totient is φ = 142776.

The previous prime is 285553. The next prime is 285557. The reversal of 285556 is 655582.

It can be written as a sum of positive squares in only one way, i.e., 285156 + 400 = 534^2 + 20^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35691 + ... + 35698.

2²⁸⁵⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

285556 is a deficient number, since it is larger than the sum of its proper divisors (214174).

285556 is a wasteful number, since it uses less digits than its factorization.

285556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71393 (or 71391 counting only the distinct ones).

The product of its digits is 12000, while the sum is 31.

The square root of 285556 is about 534.3744005845. The cubic root of 285556 is about 65.8512105841.

It can be divided in two parts, 28555 and 6, that added together give a 4-th power (28561 = 13⁴).

The spelling of 285556 in words is "two hundred eighty-five thousand, five hundred fifty-six".