3965194840 has 16 divisors (see below), whose sum is σ = 8921688480. Its totient is φ = 1586077920.

The previous prime is 3965194837. The next prime is 3965194861. The reversal of 3965194840 is 484915693.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49564896 + ... + 49564975.

It is an arithmetic number, because the mean of its divisors is an integer number (557605530).

Almost surely, 2^3965194840 is an apocalyptic number.

It is an amenable number.

3965194840 is an abundant number, since it is smaller than the sum of its proper divisors (4956493640).

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

3965194840 is a wasteful number, since it uses less digits than its factorization.

3965194840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99129882 (or 99129878 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 49.

The square root of 3965194840 is about 62969.7930757280. The cubic root of 3965194840 is about 1582.7834874021.

The spelling of 3965194840 in words is "three billion, nine hundred sixty-five million, one hundred ninety-four thousand, eight hundred forty".