853138886 has 4 divisors (see below), whose sum is σ = 1279708332. Its totient is φ = 426569442.

The previous prime is 853138873. The next prime is 853138919. The reversal of 853138886 is 688831358.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213284720 + ... + 213284723.

It is an arithmetic number, because the mean of its divisors is an integer number (319927083).

Almost surely, 2^853138886 is an apocalyptic number.

853138886 is a deficient number, since it is larger than the sum of its proper divisors (426569446).

853138886 is a wasteful number, since it uses less digits than its factorization.

853138886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426569445.

The product of its digits is 1105920, while the sum is 50.

The square root of 853138886 is about 29208.5413192785. The cubic root of 853138886 is about 948.4328310976.

The spelling of 853138886 in words is "eight hundred fifty-three million, one hundred thirty-eight thousand, eight hundred eighty-six".