3878349 has 4 divisors (see below), whose sum is σ = 5171136. Its totient is φ = 2585564.

The previous prime is 3878323. The next prime is 3878359. The reversal of 3878349 is 9438783.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9438783 = 3 ⋅3146261.

It is a cyclic number.

It is not a de Polignac number, because 3878349 - 2⁷ = 3878221 is a prime.

It is a D-number.

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

3878349 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3878349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3878359) 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, 646389 + ... + 646394.

It is an arithmetic number, because the mean of its divisors is an integer number (1292784).

Almost surely, 2^3878349 is an apocalyptic number.

It is an amenable number.

3878349 is a deficient number, since it is larger than the sum of its proper divisors (1292787).

3878349 is a wasteful number, since it uses less digits than its factorization.

3878349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292786.

The product of its digits is 145152, while the sum is 42.

The square root of 3878349 is about 1969.3524316384. The cubic root of 3878349 is about 157.1142689828.

It can be divided in two parts, 38 and 78349, that added together give a palindrome (78387).

The spelling of 3878349 in words is "three million, eight hundred seventy-eight thousand, three hundred forty-nine".