3938939769 has 16 divisors (see below), whose sum is σ = 5348030400. Its totient is φ = 2578022976.

The previous prime is 3938939749. The next prime is 3938939783. The reversal of 3938939769 is 9679398393.

It is not a de Polignac number, because 3938939769 - 2¹¹ = 3938937721 is a prime.

It is a super-2 number, since 2×3938939769² = 31030493007619546722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3938939749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122427 + ... + 151215.

It is an arithmetic number, because the mean of its divisors is an integer number (334251900).

Almost surely, 2^3938939769 is an apocalyptic number.

It is an amenable number.

3938939769 is a deficient number, since it is larger than the sum of its proper divisors (1409090631).

3938939769 is a wasteful number, since it uses less digits than its factorization.

3938939769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29624.

The product of its digits is 59521392, while the sum is 66.

The square root of 3938939769 is about 62760.9732955122. The cubic root of 3938939769 is about 1579.2823436581.

The spelling of 3938939769 in words is "three billion, nine hundred thirty-eight million, nine hundred thirty-nine thousand, seven hundred sixty-nine".