3906878885 has 32 divisors (see below), whose sum is σ = 6109592832. Its totient is φ = 2327454720.

The previous prime is 3906878879. The next prime is 3906878887. The reversal of 3906878885 is 5888786093.

It is not a de Polignac number, because 3906878885 - 2¹⁰ = 3906877861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3906878887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 244811 + ... + 260280.

It is an arithmetic number, because the mean of its divisors is an integer number (190924776).

Almost surely, 2^3906878885 is an apocalyptic number.

3906878885 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3906878885 is a deficient number, since it is larger than the sum of its proper divisors (2202713947).

3906878885 is a wasteful number, since it uses less digits than its factorization.

3906878885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505133.

The product of its (nonzero) digits is 23224320, while the sum is 62.

The square root of 3906878885 is about 62505.0308775222. The cubic root of 3906878885 is about 1574.9858246814.

The spelling of 3906878885 in words is "three billion, nine hundred six million, eight hundred seventy-eight thousand, eight hundred eighty-five".