858616852 has 12 divisors (see below), whose sum is σ = 1528047360. Its totient is φ = 422031896.

The previous prime is 858616849. The next prime is 858616853. The reversal of 858616852 is 258616858.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 858616796 and 858616805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858616853) 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, 1818868 + ... + 1819339.

It is an arithmetic number, because the mean of its divisors is an integer number (127337280).

Almost surely, 2^858616852 is an apocalyptic number.

It is an amenable number.

858616852 is a deficient number, since it is larger than the sum of its proper divisors (669430508).

858616852 is a wasteful number, since it uses less digits than its factorization.

858616852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3638270 (or 3638268 counting only the distinct ones).

The product of its digits is 921600, while the sum is 49.

The square root of 858616852 is about 29302.1646299382. The cubic root of 858616852 is about 950.4584498251.

The spelling of 858616852 in words is "eight hundred fifty-eight million, six hundred sixteen thousand, eight hundred fifty-two".