3909872506 has 16 divisors (see below), whose sum is σ = 5883344064. Its totient is φ = 1948767264.

The previous prime is 3909872453. The next prime is 3909872513. The reversal of 3909872506 is 6052789093.

It is a self number, because there is not a number n which added to its sum of digits gives 3909872506.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1439806 + ... + 1442518.

It is an arithmetic number, because the mean of its divisors is an integer number (367709004).

Almost surely, 2^3909872506 is an apocalyptic number.

3909872506 is a deficient number, since it is larger than the sum of its proper divisors (1973471558).

3909872506 is a wasteful number, since it uses less digits than its factorization.

3909872506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4725.

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 3909872506 is about 62528.9733323681. The cubic root of 3909872506 is about 1575.3879962556.

The spelling of 3909872506 in words is "three billion, nine hundred nine million, eight hundred seventy-two thousand, five hundred six".