816640852 has 12 divisors (see below), whose sum is σ = 1491257376. Its totient is φ = 390567320.

The previous prime is 816640837. The next prime is 816640859. The reversal of 816640852 is 258046618.

816640852 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816640859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4438174 + ... + 4438357.

It is an arithmetic number, because the mean of its divisors is an integer number (124271448).

Almost surely, 2^816640852 is an apocalyptic number.

It is an amenable number.

816640852 is a deficient number, since it is larger than the sum of its proper divisors (674616524).

816640852 is a wasteful number, since it uses less digits than its factorization.

816640852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8876558 (or 8876556 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 816640852 is about 28576.9286663210. The cubic root of 816640852 is about 934.7103116591.

The spelling of 816640852 in words is "eight hundred sixteen million, six hundred forty thousand, eight hundred fifty-two".