3900878709 has 16 divisors (see below), whose sum is σ = 6401442432. Its totient is φ = 2057606208.

The previous prime is 3900878699. The next prime is 3900878713. The reversal of 3900878709 is 9078780093.

It is a happy number.

It is not a de Polignac number, because 3900878709 - 2¹² = 3900874613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3900878719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7144194 + ... + 7144739.

It is an arithmetic number, because the mean of its divisors is an integer number (400090152).

Almost surely, 2^3900878709 is an apocalyptic number.

3900878709 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

3900878709 is a deficient number, since it is larger than the sum of its proper divisors (2500563723).

3900878709 is a wasteful number, since it uses less digits than its factorization.

3900878709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14288956.

The product of its (nonzero) digits is 762048, while the sum is 51.

The square root of 3900878709 is about 62457.0148902427. The cubic root of 3900878709 is about 1574.1791249758.

The spelling of 3900878709 in words is "three billion, nine hundred million, eight hundred seventy-eight thousand, seven hundred nine".