3809705920 has 28 divisors (see below), whose sum is σ = 9071862984. Its totient is φ = 1523882240.

The previous prime is 3809705917. The next prime is 3809705923. The reversal of 3809705920 is 295079083.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3809705917) and next prime (3809705923).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3809705923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5952346 + ... + 5952985.

Almost surely, 2^3809705920 is an apocalyptic number.

It is an amenable number.

3809705920 is an abundant number, since it is smaller than the sum of its proper divisors (5262157064).

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

3809705920 is a wasteful number, since it uses less digits than its factorization.

3809705920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11905348 (or 11905338 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 3809705920 is about 61722.8152306746. The cubic root of 3809705920 is about 1561.8182174977.

The spelling of 3809705920 in words is "three billion, eight hundred nine million, seven hundred five thousand, nine hundred twenty".