864086544 has 60 divisors (see below), whose sum is σ = 2423198700. Its totient is φ = 287438592.

The previous prime is 864086539. The next prime is 864086551. The reversal of 864086544 is 445680468.

It can be written as a sum of positive squares in 2 ways, for example, as 313714944 + 550371600 = 17712^2 + 23460^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 864086544.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67402 + ... + 79190.

It is an arithmetic number, because the mean of its divisors is an integer number (40386645).

Almost surely, 2^864086544 is an apocalyptic number.

It is an amenable number.

864086544 is an abundant number, since it is smaller than the sum of its proper divisors (1559112156).

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

864086544 is a wasteful number, since it uses less digits than its factorization.

864086544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12312 (or 12303 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 45.

The square root of 864086544 is about 29395.3490198705. The cubic root of 864086544 is about 952.4724310536.

The spelling of 864086544 in words is "eight hundred sixty-four million, eighty-six thousand, five hundred forty-four".