853438686 has 8 divisors (see below), whose sum is σ = 1706877384. Its totient is φ = 284479560.

The previous prime is 853438681. The next prime is 853438687. The reversal of 853438686 is 686834358.

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

853438686 is an admirable number.

It is a super-2 number, since 2×853438686² = 1456715181522813192, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (853438681) 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, 71119885 + ... + 71119896.

It is an arithmetic number, because the mean of its divisors is an integer number (213359673).

Almost surely, 2^853438686 is an apocalyptic number.

853438686 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

853438686 is a wasteful number, since it uses less digits than its factorization.

853438686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142239786.

The product of its digits is 3317760, while the sum is 51.

The square root of 853438686 is about 29213.6729289557. The cubic root of 853438686 is about 948.5439137780.

The spelling of 853438686 in words is "eight hundred fifty-three million, four hundred thirty-eight thousand, six hundred eighty-six".