286815138 has 32 divisors (see below), whose sum is σ = 584081280. Its totient is φ = 93878400.

The previous prime is 286815121. The next prime is 286815167. The reversal of 286815138 is 831518682.

It is a self number, because there is not a number n which added to its sum of digits gives 286815138.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78856 + ... + 82412.

It is an arithmetic number, because the mean of its divisors is an integer number (18252540).

Almost surely, 2^286815138 is an apocalyptic number.

286815138 is an abundant number, since it is smaller than the sum of its proper divisors (297266142).

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

286815138 is a wasteful number, since it uses less digits than its factorization.

286815138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3802.

The product of its digits is 92160, while the sum is 42.

The square root of 286815138 is about 16935.6174378143. The cubic root of 286815138 is about 659.4785734682.

The spelling of 286815138 in words is "two hundred eighty-six million, eight hundred fifteen thousand, one hundred thirty-eight".