286620 has 48 divisors (see below), whose sum is σ = 852768. Its totient is φ = 71680.

The previous prime is 286619. The next prime is 286633. The reversal of 286620 is 26682.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 286620.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 880 + ... + 1160.

It is an arithmetic number, because the mean of its divisors is an integer number (17766).

2²⁸⁶⁶²⁰ is an apocalyptic number.

286620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 286620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (426384).

286620 is an abundant number, since it is smaller than the sum of its proper divisors (566148).

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

286620 is a wasteful number, since it uses less digits than its factorization.

286620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 286620 is about 535.3690316034. The cubic root of 286620 is about 65.9328978242.

The spelling of 286620 in words is "two hundred eighty-six thousand, six hundred twenty".