3899845 has 8 divisors (see below), whose sum is σ = 4926240. Its totient is φ = 2955600.

The previous prime is 3899843. The next prime is 3899867. The reversal of 3899845 is 5489983.

3899845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3899845 - 2¹ = 3899843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3899795 and 3899804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3899843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20431 + ... + 20620.

It is an arithmetic number, because the mean of its divisors is an integer number (615780).

Almost surely, 2^3899845 is an apocalyptic number.

It is an amenable number.

3899845 is a deficient number, since it is larger than the sum of its proper divisors (1026395).

3899845 is a wasteful number, since it uses less digits than its factorization.

3899845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41075.

The product of its digits is 311040, while the sum is 46.

The square root of 3899845 is about 1974.8025217727. The cubic root of 3899845 is about 157.4040063411.

The spelling of 3899845 in words is "three million, eight hundred ninety-nine thousand, eight hundred forty-five".