3930787857 has 16 divisors (see below), whose sum is σ = 5402911680. Its totient is φ = 2540812032.

The previous prime is 3930787813. The next prime is 3930787859. The reversal of 3930787857 is 7587870393.

It is a de Polignac number, because none of the positive numbers 2^k-3930787857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3930787797 and 3930787806.

It is not an unprimeable number, because it can be changed into a prime (3930787859) 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, 139188 + ... + 165029.

It is an arithmetic number, because the mean of its divisors is an integer number (337681980).

Almost surely, 2^3930787857 is an apocalyptic number.

It is an amenable number.

3930787857 is a deficient number, since it is larger than the sum of its proper divisors (1472123823).

3930787857 is a wasteful number, since it uses less digits than its factorization.

3930787857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304352.

The product of its (nonzero) digits is 8890560, while the sum is 57.

The square root of 3930787857 is about 62695.9955419802. The cubic root of 3930787857 is about 1578.1921126990.

The spelling of 3930787857 in words is "three billion, nine hundred thirty million, seven hundred eighty-seven thousand, eight hundred fifty-seven".