1686851852 has 18 divisors (see below), whose sum is σ = 3433948812. Its totient is φ = 722936424.

The previous prime is 1686851851. The next prime is 1686851857. The reversal of 1686851852 is 2581586861.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1686851852.

It is not an unprimeable number, because it can be changed into a prime (1686851851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4302998 + ... + 4303389.

It is an arithmetic number, because the mean of its divisors is an integer number (190774934).

Almost surely, 2^1686851852 is an apocalyptic number.

It is an amenable number.

1686851852 is an abundant number, since it is smaller than the sum of its proper divisors (1747096960).

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

1686851852 is a wasteful number, since it uses less digits than its factorization.

1686851852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8606405 (or 8606396 counting only the distinct ones).

The product of its digits is 921600, while the sum is 50.

The square root of 1686851852 is about 41071.3020489977. The cubic root of 1686851852 is about 1190.3983441509.

The spelling of 1686851852 in words is "one billion, six hundred eighty-six million, eight hundred fifty-one thousand, eight hundred fifty-two".