3945860890 has 8 divisors (see below), whose sum is σ = 7102549620. Its totient is φ = 1578344352.

The previous prime is 3945860873. The next prime is 3945860909. The reversal of 3945860890 is 980685493.

It is a happy number.

3945860890 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 2 ways, for example, as 3392247049 + 553613841 = 58243^2 + 23529^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197293035 + ... + 197293054.

Almost surely, 2^3945860890 is an apocalyptic number.

3945860890 is a deficient number, since it is larger than the sum of its proper divisors (3156688730).

3945860890 is a wasteful number, since it uses less digits than its factorization.

3945860890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394586096.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The square root of 3945860890 is about 62816.0878278805. The cubic root of 3945860890 is about 1580.2067894168.

The spelling of 3945860890 in words is "three billion, nine hundred forty-five million, eight hundred sixty thousand, eight hundred ninety".