3969728448 has 56 divisors (see below), whose sum is σ = 12003706752. Its totient is φ = 1134207744.

The previous prime is 3969728339. The next prime is 3969728471. The reversal of 3969728448 is 8448279693.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 3969728391 and 3969728400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1475490 + ... + 1478177.

Almost surely, 2^3969728448 is an apocalyptic number.

It is an amenable number.

3969728448 is an abundant number, since it is smaller than the sum of its proper divisors (8033978304).

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

3969728448 is a wasteful number, since it uses less digits than its factorization.

3969728448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2953689 (or 2953679 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 60.

The square root of 3969728448 is about 63005.7810680893. The cubic root of 3969728448 is about 1583.3864831453.

The spelling of 3969728448 in words is "three billion, nine hundred sixty-nine million, seven hundred twenty-eight thousand, four hundred forty-eight".