3820806855 has 24 divisors (see below), whose sum is σ = 6868020432. Its totient is φ = 2037763008.

The previous prime is 3820806853. The next prime is 3820806863. The reversal of 3820806855 is 5586080283.

It is a happy number.

It is not a de Polignac number, because 3820806855 - 2¹ = 3820806853 is a prime.

It is a super-4 number, since 4×3820806855⁴ (a number of 39 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 3820806855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3820806853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1571134 + ... + 1573563.

It is an arithmetic number, because the mean of its divisors is an integer number (286167518).

Almost surely, 2^3820806855 is an apocalyptic number.

3820806855 is a deficient number, since it is larger than the sum of its proper divisors (3047213577).

3820806855 is an equidigital number, since it uses as much as digits as its factorization.

3820806855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3144717 (or 3144705 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The square root of 3820806855 is about 61812.6755204788. The cubic root of 3820806855 is about 1563.3337176690. Note that the first 3 decimals are identical.

The spelling of 3820806855 in words is "three billion, eight hundred twenty million, eight hundred six thousand, eight hundred fifty-five".