3920080640 has 72 divisors (see below), whose sum is σ = 10731245280. Its totient is φ = 1344024576.

The previous prime is 3920080639. The next prime is 3920080657. The reversal of 3920080640 is 460800293.

3920080640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 3920080597 and 3920080606.

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, 209795 + ... + 227714.

Almost surely, 2^3920080640 is an apocalyptic number.

It is an amenable number.

3920080640 is an abundant number, since it is smaller than the sum of its proper divisors (6811164640).

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

3920080640 is an equidigital number, since it uses as much as digits as its factorization.

3920080640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437537 (or 437523 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 3920080640 is about 62610.5473542597. The cubic root of 3920080640 is about 1576.7578445266.

The spelling of 3920080640 in words is "three billion, nine hundred twenty million, eighty thousand, six hundred forty".