816658838 has 32 divisors (see below), whose sum is σ = 1322956800. Its totient is φ = 377125056.

The previous prime is 816658837. The next prime is 816658841. The reversal of 816658838 is 838856618.

816658838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 816658838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816658837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173723 + ... + 178361.

It is an arithmetic number, because the mean of its divisors is an integer number (41342400).

Almost surely, 2^816658838 is an apocalyptic number.

816658838 is a deficient number, since it is larger than the sum of its proper divisors (506297962).

816658838 is a wasteful number, since it uses less digits than its factorization.

816658838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4796.

The product of its digits is 2211840, while the sum is 53.

The square root of 816658838 is about 28577.2433590086. The cubic root of 816658838 is about 934.7171737439.

The spelling of 816658838 in words is "eight hundred sixteen million, six hundred fifty-eight thousand, eight hundred thirty-eight".