3886720139 has 4 divisors (see below), whose sum is σ = 4012098240. Its totient is φ = 3761342040.

The previous prime is 3886720121. The next prime is 3886720177. The reversal of 3886720139 is 9310276883.

3886720139 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3886720139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3886720093 and 3886720102.

It is not an unprimeable number, because it can be changed into a prime (3886722139) 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 3 ways as a sum of consecutive naturals, for example, 62689004 + ... + 62689065.

It is an arithmetic number, because the mean of its divisors is an integer number (1003024560).

Almost surely, 2^3886720139 is an apocalyptic number.

3886720139 is a deficient number, since it is larger than the sum of its proper divisors (125378101).

3886720139 is a wasteful number, since it uses less digits than its factorization.

3886720139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125378100.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 3886720139 is about 62343.5653375711. The cubic root of 3886720139 is about 1572.2722772242.

The spelling of 3886720139 in words is "three billion, eight hundred eighty-six million, seven hundred twenty thousand, one hundred thirty-nine".