864833387 has 16 divisors (see below), whose sum is σ = 973814400. Its totient is φ = 761312640.

The previous prime is 864833353. The next prime is 864833413. The reversal of 864833387 is 783338468.

It is a happy number.

It is not a de Polignac number, because 864833387 - 2²⁰ = 863784811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (864833287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33539 + ... + 53427.

It is an arithmetic number, because the mean of its divisors is an integer number (60863400).

Almost surely, 2^864833387 is an apocalyptic number.

864833387 is a deficient number, since it is larger than the sum of its proper divisors (108981013).

864833387 is a wasteful number, since it uses less digits than its factorization.

864833387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20026.

The product of its digits is 2322432, while the sum is 50.

The square root of 864833387 is about 29408.0496973193. The cubic root of 864833387 is about 952.7467641160.

The spelling of 864833387 in words is "eight hundred sixty-four million, eight hundred thirty-three thousand, three hundred eighty-seven".