3938378311 has 16 divisors (see below), whose sum is σ = 4748761600. Its totient is φ = 3190749408.

The previous prime is 3938378293. The next prime is 3938378317. The reversal of 3938378311 is 1138738393.

It is not a de Polignac number, because 3938378311 - 2⁷ = 3938378183 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 (3938378317) 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 15 ways as a sum of consecutive naturals, for example, 24661 + ... + 92113.

It is an arithmetic number, because the mean of its divisors is an integer number (296797600).

Almost surely, 2^3938378311 is an apocalyptic number.

3938378311 is a deficient number, since it is larger than the sum of its proper divisors (810383289).

3938378311 is a wasteful number, since it uses less digits than its factorization.

3938378311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67918.

The product of its digits is 326592, while the sum is 46.

The square root of 3938378311 is about 62756.5001493869. The cubic root of 3938378311 is about 1579.2073029203.

The spelling of 3938378311 in words is "three billion, nine hundred thirty-eight million, three hundred seventy-eight thousand, three hundred eleven".