828818638 has 8 divisors (see below), whose sum is σ = 1243919880. Its totient is φ = 414178680.

The previous prime is 828818591. The next prime is 828818647. The reversal of 828818638 is 836818828.

828818638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×828818638³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110793 + ... + 118036.

It is an arithmetic number, because the mean of its divisors is an integer number (155489985).

Almost surely, 2^828818638 is an apocalyptic number.

828818638 is a deficient number, since it is larger than the sum of its proper divisors (415101242).

828818638 is a wasteful number, since it uses less digits than its factorization.

828818638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230642.

The product of its digits is 1179648, while the sum is 52.

The square root of 828818638 is about 28789.2104441925. The cubic root of 828818638 is about 939.3335543207. Note that the first 3 decimals are identical.

It can be divided in two parts, 82881 and 8638, that added together give a palindrome (91519).

The spelling of 828818638 in words is "eight hundred twenty-eight million, eight hundred eighteen thousand, six hundred thirty-eight".