2188630806 has 36 divisors (see below), whose sum is σ = 4456347636. Its totient is φ = 716594480.

The previous prime is 2188630793. The next prime is 2188630837. The reversal of 2188630806 is 6080368812.

2188630806 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8136040 + ... + 8136308.

Almost surely, 2^2188630806 is an apocalyptic number.

2188630806 is an abundant number, since it is smaller than the sum of its proper divisors (2267716830).

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

2188630806 is an frugal number, since it uses more digits than its factorization.

2188630806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 2188630806 is about 46782.8045974159. The cubic root of 2188630806 is about 1298.3471708724.

The spelling of 2188630806 in words is "two billion, one hundred eighty-eight million, six hundred thirty thousand, eight hundred six".