3928638719 has 2 divisors, whose sum is σ = 3928638720. Its totient is φ = 3928638718.

The previous prime is 3928638709. The next prime is 3928638731. The reversal of 3928638719 is 9178368293.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3928638719 - 2²⁰ = 3927590143 is a prime.

It is a super-2 number, since 2×3928638719² = 30868404368851921922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3928638709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1964319359 + 1964319360.

It is an arithmetic number, because the mean of its divisors is an integer number (1964319360).

Almost surely, 2^3928638719 is an apocalyptic number.

3928638719 is a deficient number, since it is larger than the sum of its proper divisors (1).

3928638719 is an equidigital number, since it uses as much as digits as its factorization.

3928638719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 56.

The square root of 3928638719 is about 62678.8538424244. The cubic root of 3928638719 is about 1577.9044374633.

The spelling of 3928638719 in words is "three billion, nine hundred twenty-eight million, six hundred thirty-eight thousand, seven hundred nineteen".