2185400986 has 8 divisors (see below), whose sum is σ = 3383846784. Its totient is φ = 1057452060.

The previous prime is 2185400981. The next prime is 2185401007. The reversal of 2185400986 is 6890045812.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (2185400981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17624140 + ... + 17624263.

It is an arithmetic number, because the mean of its divisors is an integer number (422980848).

Almost surely, 2^2185400986 is an apocalyptic number.

2185400986 is a deficient number, since it is larger than the sum of its proper divisors (1198445798).

2185400986 is a wasteful number, since it uses less digits than its factorization.

2185400986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35248436.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 2185400986 is about 46748.2725456246. The cubic root of 2185400986 is about 1297.7081881007.

The spelling of 2185400986 in words is "two billion, one hundred eighty-five million, four hundred thousand, nine hundred eighty-six".