3878709 has 16 divisors (see below), whose sum is σ = 5328000. Its totient is φ = 2509056.

The previous prime is 3878701. The next prime is 3878713. The reversal of 3878709 is 9078783.

It is not a de Polignac number, because 3878709 - 2³ = 3878701 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3878701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19392 + ... + 19590.

It is an arithmetic number, because the mean of its divisors is an integer number (333000).

Almost surely, 2^3878709 is an apocalyptic number.

It is an amenable number.

3878709 is a deficient number, since it is larger than the sum of its proper divisors (1449291).

3878709 is a wasteful number, since it uses less digits than its factorization.

3878709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 3878709 is about 1969.4438301206. The cubic root of 3878709 is about 157.1191301052.

The spelling of 3878709 in words is "three million, eight hundred seventy-eight thousand, seven hundred nine".