286649 has 12 divisors (see below), whose sum is σ = 331968. Its totient is φ = 246840.

The previous prime is 286633. The next prime is 286651. The reversal of 286649 is 946682.

It is not a de Polignac number, because 286649 - 2⁴ = 286633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 286649.

It is not an unprimeable number, because it can be changed into a prime (286609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2732 + ... + 2834.

It is an arithmetic number, because the mean of its divisors is an integer number (27664).

2²⁸⁶⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

286649 is a deficient number, since it is larger than the sum of its proper divisors (45319).

286649 is a wasteful number, since it uses less digits than its factorization.

286649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 137 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 286649 is about 535.3961150401. The cubic root of 286649 is about 65.9351214299.

The spelling of 286649 in words is "two hundred eighty-six thousand, six hundred forty-nine".