3920688447 has 16 divisors (see below), whose sum is σ = 5662257888. Its totient is φ = 2398780800.

The previous prime is 3920688439. The next prime is 3920688449. The reversal of 3920688447 is 7448860293.

It is not a de Polignac number, because 3920688447 - 2³ = 3920688439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3920688447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3920688449) 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, 283804 + ... + 297297.

It is an arithmetic number, because the mean of its divisors is an integer number (353891118).

Almost surely, 2^3920688447 is an apocalyptic number.

3920688447 is a deficient number, since it is larger than the sum of its proper divisors (1741569441).

3920688447 is a wasteful number, since it uses less digits than its factorization.

3920688447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581290.

The product of its (nonzero) digits is 2322432, while the sum is 51.

The square root of 3920688447 is about 62615.4010368056. The cubic root of 3920688447 is about 1576.8393322149.

The spelling of 3920688447 in words is "three billion, nine hundred twenty million, six hundred eighty-eight thousand, four hundred forty-seven".