3959945900 has 18 divisors (see below), whose sum is σ = 8593082820. Its totient is φ = 1583978320.

The previous prime is 3959945887. The next prime is 3959945909. The reversal of 3959945900 is 95499593.

It is a super-3 number, since 3×3959945900³ (a number of 30 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (3959945909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19799630 + ... + 19799829.

It is an arithmetic number, because the mean of its divisors is an integer number (477393490).

Almost surely, 2^3959945900 is an apocalyptic number.

It is an amenable number.

3959945900 is an abundant number, since it is smaller than the sum of its proper divisors (4633136920).

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

3959945900 is a wasteful number, since it uses less digits than its factorization.

3959945900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39599473 (or 39599466 counting only the distinct ones).

The product of its (nonzero) digits is 1968300, while the sum is 53.

The square root of 3959945900 is about 62928.1010360236. The cubic root of 3959945900 is about 1582.0847740158.

The spelling of 3959945900 in words is "three billion, nine hundred fifty-nine million, nine hundred forty-five thousand, nine hundred".