3878456439 has 96 divisors (see below), whose sum is σ = 6379360960. Its totient is φ = 2080235520.

The previous prime is 3878456383. The next prime is 3878456473. The reversal of 3878456439 is 9346548783.

It is not a de Polignac number, because 3878456439 - 2⁹ = 3878455927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3878458439) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16936377 + ... + 16936605.

Almost surely, 2^3878456439 is an apocalyptic number.

3878456439 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

3878456439 is a deficient number, since it is larger than the sum of its proper divisors (2500904521).

3878456439 is a wasteful number, since it uses less digits than its factorization.

3878456439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401 (or 390 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 57.

The square root of 3878456439 is about 62277.2545878509. The cubic root of 3878456439 is about 1571.1571977576.

The spelling of 3878456439 in words is "three billion, eight hundred seventy-eight million, four hundred fifty-six thousand, four hundred thirty-nine".