864539286 has 64 divisors (see below), whose sum is σ = 1910345472. Its totient is φ = 259189632.

The previous prime is 864539251. The next prime is 864539293. The reversal of 864539286 is 682935468.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 673201 + ... + 674483.

It is an arithmetic number, because the mean of its divisors is an integer number (29849148).

Almost surely, 2^864539286 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 864539286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (955172736).

864539286 is an abundant number, since it is smaller than the sum of its proper divisors (1045806186).

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

864539286 is a wasteful number, since it uses less digits than its factorization.

864539286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517.

The product of its digits is 2488320, while the sum is 51.

The square root of 864539286 is about 29403.0489235385. The cubic root of 864539286 is about 952.6387527353.

The spelling of 864539286 in words is "eight hundred sixty-four million, five hundred thirty-nine thousand, two hundred eighty-six".