3878161 has 8 divisors (see below), whose sum is σ = 4498880. Its totient is φ = 3274128.

The previous prime is 3878143. The next prime is 3878177. The reversal of 3878161 is 1618783.

3878161 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 a cyclic number.

It is not a de Polignac number, because 3878161 - 2²¹ = 1781009 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3878101) 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, 3666 + ... + 4603.

It is an arithmetic number, because the mean of its divisors is an integer number (562360).

Almost surely, 2^3878161 is an apocalyptic number.

It is an amenable number.

3878161 is a deficient number, since it is larger than the sum of its proper divisors (620719).

3878161 is an equidigital number, since it uses as much as digits as its factorization.

3878161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8343.

The product of its digits is 8064, while the sum is 34.

The square root of 3878161 is about 1969.3046996339. The cubic root of 3878161 is about 157.1117302771. Note that the first 3 decimals are identical.

The spelling of 3878161 in words is "three million, eight hundred seventy-eight thousand, one hundred sixty-one".