3935978864 has 10 divisors (see below), whose sum is σ = 7625959080. Its totient is φ = 1967989424.

The previous prime is 3935978863. The next prime is 3935978869. The reversal of 3935978864 is 4688795393.

It is a junction number, because it is equal to n+sod(n) for n = 3935978797 and 3935978806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3935978863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122999324 + ... + 122999355.

It is an arithmetic number, because the mean of its divisors is an integer number (762595908).

Almost surely, 2^3935978864 is an apocalyptic number.

It is an amenable number.

3935978864 is a deficient number, since it is larger than the sum of its proper divisors (3689980216).

3935978864 is a wasteful number, since it uses less digits than its factorization.

3935978864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245998687 (or 245998681 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 62.

The square root of 3935978864 is about 62737.3801174388. The cubic root of 3935978864 is about 1578.8865284194.

The spelling of 3935978864 in words is "three billion, nine hundred thirty-five million, nine hundred seventy-eight thousand, eight hundred sixty-four".