286690 has 8 divisors (see below), whose sum is σ = 516060. Its totient is φ = 114672.

The previous prime is 286687. The next prime is 286697. The reversal of 286690 is 96682.

It can be written as a sum of positive squares in 2 ways, for example, as 284089 + 2601 = 533^2 + 51^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×286690² = 164382312200, which contains 22 as substring.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (286697) 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 3 ways as a sum of consecutive naturals, for example, 14325 + ... + 14344.

2²⁸⁶⁶⁹⁰ is an apocalyptic number.

286690 is a deficient number, since it is larger than the sum of its proper divisors (229370).

286690 is a wasteful number, since it uses less digits than its factorization.

286690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28676.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 286690 is about 535.4344030785. The cubic root of 286690 is about 65.9382648923.

The spelling of 286690 in words is "two hundred eighty-six thousand, six hundred ninety".