286139328 has 112 divisors (see below), whose sum is σ = 783799296. Its totient is φ = 92067840.

The previous prime is 286139311. The next prime is 286139333. The reversal of 286139328 is 823931682.

286139328 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

Its product of digits (124416) is a multiple of the sum of its prime divisors (432).

It is a self number, because there is not a number n which added to its sum of digits gives 286139328.

It is a congruent number.

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, 1283025 + ... + 1283247.

It is an arithmetic number, because the mean of its divisors is an integer number (6998208).

Almost surely, 2^286139328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 286139328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (391899648).

286139328 is an abundant number, since it is smaller than the sum of its proper divisors (497659968).

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

286139328 is a wasteful number, since it uses less digits than its factorization.

286139328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442 (or 432 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 286139328 is about 16915.6533423927. The cubic root of 286139328 is about 658.9601992476.

The spelling of 286139328 in words is "two hundred eighty-six million, one hundred thirty-nine thousand, three hundred twenty-eight".