864405668 has 36 divisors (see below), whose sum is σ = 1820373660. Its totient is φ = 357682752.

The previous prime is 864405649. The next prime is 864405677. The reversal of 864405668 is 866504468.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 382515364 + 481890304 = 19558^2 + 21952^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70355 + ... + 81722.

It is an arithmetic number, because the mean of its divisors is an integer number (50565935).

Almost surely, 2^864405668 is an apocalyptic number.

It is an amenable number.

864405668 is an abundant number, since it is smaller than the sum of its proper divisors (955967992).

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

864405668 is a wasteful number, since it uses less digits than its factorization.

864405668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152124 (or 152115 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 47.

The square root of 864405668 is about 29400.7766564082. The cubic root of 864405668 is about 952.5896721651.

The spelling of 864405668 in words is "eight hundred sixty-four million, four hundred five thousand, six hundred sixty-eight".