858869836 has 12 divisors (see below), whose sum is σ = 1639660680. Its totient is φ = 390395360.

The previous prime is 858869833. The next prime is 858869867. The reversal of 858869836 is 638968858.

It is not an unprimeable number, because it can be changed into a prime (858869833) 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, 9759841 + ... + 9759928.

It is an arithmetic number, because the mean of its divisors is an integer number (136638390).

Almost surely, 2^858869836 is an apocalyptic number.

It is an amenable number.

858869836 is a deficient number, since it is larger than the sum of its proper divisors (780790844).

858869836 is a wasteful number, since it uses less digits than its factorization.

858869836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19519784 (or 19519782 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 61.

The square root of 858869836 is about 29306.4811261946. The cubic root of 858869836 is about 950.5517887683.

The spelling of 858869836 in words is "eight hundred fifty-eight million, eight hundred sixty-nine thousand, eight hundred thirty-six".