2199987906 has 16 divisors (see below), whose sum is σ = 4400760000. Its totient is φ = 733198608.

The previous prime is 2199987869. The next prime is 2199987917. The reversal of 2199987906 is 6097899912.

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 2199987906.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7620 + ... + 66768.

It is an arithmetic number, because the mean of its divisors is an integer number (275047500).

Almost surely, 2^2199987906 is an apocalyptic number.

2199987906 is an abundant number, since it is smaller than the sum of its proper divisors (2200772094).

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

2199987906 is a wasteful number, since it uses less digits than its factorization.

2199987906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65353.

The product of its (nonzero) digits is 4408992, while the sum is 60.

The square root of 2199987906 is about 46904.0286755839. The cubic root of 2199987906 is about 1300.5890636117.

The spelling of 2199987906 in words is "two billion, one hundred ninety-nine million, nine hundred eighty-seven thousand, nine hundred six".