3840399 has 8 divisors (see below), whose sum is σ = 5689520. Its totient is φ = 2560248.

The previous prime is 3840391. The next prime is 3840401. The reversal of 3840399 is 9930483.

It is not a de Polignac number, because 3840399 - 2³ = 3840391 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 7.

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3840391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71092 + ... + 71145.

It is an arithmetic number, because the mean of its divisors is an integer number (711190).

Almost surely, 2^3840399 is an apocalyptic number.

3840399 is a deficient number, since it is larger than the sum of its proper divisors (1849121).

3840399 is a wasteful number, since it uses less digits than its factorization.

3840399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142246 (or 142240 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 3840399 is about 1959.6935984995. The cubic root of 3840399 is about 156.6001291818.

The spelling of 3840399 in words is "three million, eight hundred forty thousand, three hundred ninety-nine".