3939893664 has 96 divisors (see below), whose sum is σ = 12201025536. Its totient is φ = 1089365760.

The previous prime is 3939893603. The next prime is 3939893669. The reversal of 3939893664 is 4663989393.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 3939893598 and 3939893607.

It is not an unprimeable number, because it can be changed into a prime (3939893669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73732 + ... + 115395.

It is an arithmetic number, because the mean of its divisors is an integer number (127094016).

Almost surely, 2^3939893664 is an apocalyptic number.

It is an amenable number.

3939893664 is an abundant number, since it is smaller than the sum of its proper divisors (8261131872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3939893664 is a wasteful number, since it uses less digits than its factorization.

3939893664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189178 (or 189170 counting only the distinct ones).

The product of its digits is 22674816, while the sum is 60.

The square root of 3939893664 is about 62768.5722635142. The cubic root of 3939893664 is about 1579.4098185649.

The spelling of 3939893664 in words is "three billion, nine hundred thirty-nine million, eight hundred ninety-three thousand, six hundred sixty-four".