3878399 has 6 divisors (see below), whose sum is σ = 4511664. Its totient is φ = 3324300.

The previous prime is 3878389. The next prime is 3878401. The reversal of 3878399 is 9938783.

It is not a de Polignac number, because 3878399 - 2⁸ = 3878143 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 (3878359) 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 5 ways as a sum of consecutive naturals, for example, 39527 + ... + 39624.

It is an arithmetic number, because the mean of its divisors is an integer number (751944).

Almost surely, 2^3878399 is an apocalyptic number.

3878399 is a deficient number, since it is larger than the sum of its proper divisors (633265).

3878399 is an equidigital number, since it uses as much as digits as its factorization.

3878399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79165 (or 79158 counting only the distinct ones).

The product of its digits is 326592, while the sum is 47.

The square root of 3878399 is about 1969.3651261257. The cubic root of 3878399 is about 157.1149441567.

The spelling of 3878399 in words is "three million, eight hundred seventy-eight thousand, three hundred ninety-nine".