864087705 has 36 divisors (see below), whose sum is σ = 1621840428. Its totient is φ = 425393280.

The previous prime is 864087691. The next prime is 864087733. The reversal of 864087705 is 507780468.

864087705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 173606976 + 690480729 = 13176^2 + 26277^2 .

It is not a de Polignac number, because 864087705 - 2⁴ = 864087689 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 49206 + ... + 64415.

It is an arithmetic number, because the mean of its divisors is an integer number (45051123).

Almost surely, 2^864087705 is an apocalyptic number.

It is an amenable number.

864087705 is a deficient number, since it is larger than the sum of its proper divisors (757752723).

864087705 is a wasteful number, since it uses less digits than its factorization.

864087705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113658 (or 113642 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 864087705 is about 29395.3687678859. The cubic root of 864087705 is about 952.4728576389.

The spelling of 864087705 in words is "eight hundred sixty-four million, eighty-seven thousand, seven hundred five".