818912864 has 192 divisors, whose sum is σ = 2118057984. Its totient is φ = 302400000.

The previous prime is 818912849. The next prime is 818912873. The reversal of 818912864 is 468219818.

It is a happy number.

818912864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a zygodrome in base 2.

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, 5423189 + ... + 5423339.

It is an arithmetic number, because the mean of its divisors is an integer number (11031552).

Almost surely, 2^818912864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 818912864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1059028992).

818912864 is an abundant number, since it is smaller than the sum of its proper divisors (1299145120).

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

818912864 is a wasteful number, since it uses less digits than its factorization.

818912864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281 (or 273 counting only the distinct ones).

The product of its digits is 221184, while the sum is 47.

The square root of 818912864 is about 28616.6536128877. The cubic root of 818912864 is about 935.5763417397.

The spelling of 818912864 in words is "eight hundred eighteen million, nine hundred twelve thousand, eight hundred sixty-four".