286422721 has 6 divisors (see below), whose sum is σ = 310150230. Its totient is φ = 264390048.

The previous prime is 286422713. The next prime is 286422751. The reversal of 286422721 is 127224682.

It can be written as a sum of positive squares in 3 ways, for example, as 6195121 + 280227600 = 2489^2 + 16740^2 .

It is not a de Polignac number, because 286422721 - 2³ = 286422713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (286422751) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 847236 + ... + 847573.

It is an arithmetic number, because the mean of its divisors is an integer number (51691705).

Almost surely, 2^286422721 is an apocalyptic number.

It is an amenable number.

286422721 is a deficient number, since it is larger than the sum of its proper divisors (23727509).

286422721 is a wasteful number, since it uses less digits than its factorization.

286422721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694835 (or 1694822 counting only the distinct ones).

The product of its digits is 21504, while the sum is 34.

The square root of 286422721 is about 16924.0279189087. The cubic root of 286422721 is about 659.1776726630.

The spelling of 286422721 in words is "two hundred eighty-six million, four hundred twenty-two thousand, seven hundred twenty-one".