3878989 has 4 divisors (see below), whose sum is σ = 3891040. Its totient is φ = 3866940.

The previous prime is 3878981. The next prime is 3878993. The reversal of 3878989 is 9898783.

3878989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 3878989 - 2³ = 3878981 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3878981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5529 + ... + 6190.

It is an arithmetic number, because the mean of its divisors is an integer number (972760).

Almost surely, 2^3878989 is an apocalyptic number.

It is an amenable number.

3878989 is a deficient number, since it is larger than the sum of its proper divisors (12051).

3878989 is a wasteful number, since it uses less digits than its factorization.

3878989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12050.

The product of its digits is 870912, while the sum is 52.

The square root of 3878989 is about 1969.5149148966. The cubic root of 3878989 is about 157.1229107701.

It can be divided in two parts, 387 and 8989, that multiplied together give a palindrome (3478743).

The spelling of 3878989 in words is "three million, eight hundred seventy-eight thousand, nine hundred eighty-nine".