286420 has 12 divisors (see below), whose sum is σ = 601524. Its totient is φ = 114560.

The previous prime is 286411. The next prime is 286421. The reversal of 286420 is 24682.

It can be written as a sum of positive squares in 2 ways, for example, as 38416 + 248004 = 196^2 + 498^2 .

It is a junction number, because it is equal to n+sod(n) for n = 286391 and 286400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (286421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7141 + ... + 7180.

It is an arithmetic number, because the mean of its divisors is an integer number (50127).

2²⁸⁶⁴²⁰ is an apocalyptic number.

286420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

286420 is an abundant number, since it is smaller than the sum of its proper divisors (315104).

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

286420 is a wasteful number, since it uses less digits than its factorization.

286420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14330 (or 14328 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 286420 is about 535.1822119615. The cubic root of 286420 is about 65.9175585273.

The spelling of 286420 in words is "two hundred eighty-six thousand, four hundred twenty".