3805198509 has 16 divisors (see below), whose sum is σ = 5985443840. Its totient is φ = 2104256880.

The previous prime is 3805198487. The next prime is 3805198549. The reversal of 3805198509 is 9058915083.

It is not a de Polignac number, because 3805198509 - 2¹⁶ = 3805132973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3805198549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2921929 + ... + 2923230.

It is an arithmetic number, because the mean of its divisors is an integer number (374090240).

Almost surely, 2^3805198509 is an apocalyptic number.

It is an amenable number.

3805198509 is a deficient number, since it is larger than the sum of its proper divisors (2180245331).

3805198509 is a wasteful number, since it uses less digits than its factorization.

3805198509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5845200.

The product of its (nonzero) digits is 388800, while the sum is 48.

The square root of 3805198509 is about 61686.2910945374. The cubic root of 3805198509 is about 1561.2020251613.

The spelling of 3805198509 in words is "three billion, eight hundred five million, one hundred ninety-eight thousand, five hundred nine".