286636 has 24 divisors (see below), whose sum is σ = 594720. Its totient is φ = 118272.

The previous prime is 286633. The next prime is 286651. The reversal of 286636 is 636682.

286636 = T₆₉ + T₇₀ + ... + T₁₂₆.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 286598 and 286607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (286633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 636 + ... + 988.

It is an arithmetic number, because the mean of its divisors is an integer number (24780).

2²⁸⁶⁶³⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 286636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297360).

286636 is an abundant number, since it is smaller than the sum of its proper divisors (308084).

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

286636 is a wasteful number, since it uses less digits than its factorization.

286636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393 (or 391 counting only the distinct ones).

The product of its digits is 10368, while the sum is 31.

The square root of 286636 is about 535.3839743586. The cubic root of 286636 is about 65.9341246597.

The spelling of 286636 in words is "two hundred eighty-six thousand, six hundred thirty-six".