3878605 has 16 divisors (see below), whose sum is σ = 5028480. Its totient is φ = 2863168.

The previous prime is 3878597. The next prime is 3878617. The reversal of 3878605 is 5068783.

It is a cyclic number.

It is not a de Polignac number, because 3878605 - 2³ = 3878597 is a prime.

It is an Ulam number.

3878605 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2754 + ... + 3916.

It is an arithmetic number, because the mean of its divisors is an integer number (314280).

Almost surely, 2^3878605 is an apocalyptic number.

It is an amenable number.

3878605 is a deficient number, since it is larger than the sum of its proper divisors (1149875).

3878605 is a wasteful number, since it uses less digits than its factorization.

3878605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 3878605 is about 1969.4174265503. The cubic root of 3878605 is about 157.1177258118.

The spelling of 3878605 in words is "three million, eight hundred seventy-eight thousand, six hundred five".