3878813 has 8 divisors (see below), whose sum is σ = 4029696. Its totient is φ = 3729600.

The previous prime is 3878783. The next prime is 3878843. The reversal of 3878813 is 3188783.

It is an interprime number because it is at equal distance from previous prime (3878783) and next prime (3878843).

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 3878813 - 2¹⁰ = 3877789 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 (3878843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6245 + ... + 6837.

It is an arithmetic number, because the mean of its divisors is an integer number (503712).

Almost surely, 2^3878813 is an apocalyptic number.

It is an amenable number.

3878813 is a deficient number, since it is larger than the sum of its proper divisors (150883).

3878813 is a wasteful number, since it uses less digits than its factorization.

3878813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835.

The product of its digits is 32256, while the sum is 38.

The square root of 3878813 is about 1969.4702333369. The cubic root of 3878813 is about 157.1205343734.

The spelling of 3878813 in words is "three million, eight hundred seventy-eight thousand, eight hundred thirteen".