2185689942 has 24 divisors (see below), whose sum is σ = 4784486616. Its totient is φ = 721051776.

The previous prime is 2185689929. The next prime is 2185689953. The reversal of 2185689942 is 2499865812.

It is a happy number.

2185689942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 624168 + ... + 627659.

It is an arithmetic number, because the mean of its divisors is an integer number (199353609).

Almost surely, 2^2185689942 is an apocalyptic number.

2185689942 is an abundant number, since it is smaller than the sum of its proper divisors (2598796674).

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

2185689942 is a wasteful number, since it uses less digits than its factorization.

2185689942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251932 (or 1251929 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 2185689942 is about 46751.3629961737. The cubic root of 2185689942 is about 1297.7653803573.

The spelling of 2185689942 in words is "two billion, one hundred eighty-five million, six hundred eighty-nine thousand, nine hundred forty-two".