3878211 has 4 divisors (see below), whose sum is σ = 5170952. Its totient is φ = 2585472.

The previous prime is 3878209. The next prime is 3878219. The reversal of 3878211 is 1128783.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3878211 - 2¹ = 3878209 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3878219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 646366 + ... + 646371.

It is an arithmetic number, because the mean of its divisors is an integer number (1292738).

Almost surely, 2^3878211 is an apocalyptic number.

3878211 is a deficient number, since it is larger than the sum of its proper divisors (1292741).

3878211 is a wasteful number, since it uses less digits than its factorization.

3878211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292740.

The product of its digits is 2688, while the sum is 30.

The square root of 3878211 is about 1969.3173944288. The cubic root of 3878211 is about 157.1124054728.

The spelling of 3878211 in words is "three million, eight hundred seventy-eight thousand, two hundred eleven".