3920685445 has 8 divisors (see below), whose sum is σ = 4706898840. Its totient is φ = 3135164160.

The previous prime is 3920685383. The next prime is 3920685451. The reversal of 3920685445 is 5445860293.

3920685445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 122921569 + 3797763876 = 11087^2 + 61626^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3920685445 - 2²³ = 3912296837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3920685395 and 3920685404.

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, 160480 + ... + 183289.

It is an arithmetic number, because the mean of its divisors is an integer number (588362355).

Almost surely, 2^3920685445 is an apocalyptic number.

It is an amenable number.

3920685445 is a deficient number, since it is larger than the sum of its proper divisors (786213395).

3920685445 is a wasteful number, since it uses less digits than its factorization.

3920685445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346055.

The product of its (nonzero) digits is 1036800, while the sum is 46.

The square root of 3920685445 is about 62615.3770650629. The cubic root of 3920685445 is about 1576.8389297624.

The spelling of 3920685445 in words is "three billion, nine hundred twenty million, six hundred eighty-five thousand, four hundred forty-five".