3805520906 has 48 divisors (see below), whose sum is σ = 6698220480. Its totient is φ = 1615521600.

The previous prime is 3805520891. The next prime is 3805520921. The reversal of 3805520906 is 6090255083.

It is an interprime number because it is at equal distance from previous prime (3805520891) and next prime (3805520921).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a self number, because there is not a number n which added to its sum of digits gives 3805520906.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 320630 + ... + 332286.

It is an arithmetic number, because the mean of its divisors is an integer number (139546260).

Almost surely, 2^3805520906 is an apocalyptic number.

3805520906 is a deficient number, since it is larger than the sum of its proper divisors (2892699574).

3805520906 is a wasteful number, since it uses less digits than its factorization.

3805520906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11771 (or 11760 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 3805520906 is about 61688.9042373100. The cubic root of 3805520906 is about 1561.2461150762.

Adding to 3805520906 its reverse (6090255083), we get a palindrome (9895775989).

The spelling of 3805520906 in words is "three billion, eight hundred five million, five hundred twenty thousand, nine hundred six".