3899569825 has 54 divisors (see below), whose sum is σ = 5201526642. Its totient is φ = 2899814400.

The previous prime is 3899569787. The next prime is 3899569829. The reversal of 3899569825 is 5289659983.

It can be written as a sum of positive squares in 9 ways, for example, as 1411655184 + 2487914641 = 37572^2 + 49879^2 .

It is not a de Polignac number, because 3899569825 - 2⁹ = 3899569313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3899569829) 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 53 ways as a sum of consecutive naturals, for example, 20204929 + ... + 20205121.

Almost surely, 2^3899569825 is an apocalyptic number.

It is an amenable number.

3899569825 is a deficient number, since it is larger than the sum of its proper divisors (1301956817).

3899569825 is a wasteful number, since it uses less digits than its factorization.

3899569825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323 (or 258 counting only the distinct ones).

The product of its digits is 41990400, while the sum is 64.

The square root of 3899569825 is about 62446.5357325769. The cubic root of 3899569825 is about 1574.0030408578.

The spelling of 3899569825 in words is "three billion, eight hundred ninety-nine million, five hundred sixty-nine thousand, eight hundred twenty-five".