3945989342 has 32 divisors (see below), whose sum is σ = 6537991680. Its totient is φ = 1779734880.

The previous prime is 3945989339. The next prime is 3945989347. The reversal of 3945989342 is 2439895493.

It is a happy number.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3945989347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22967 + ... + 91757.

It is an arithmetic number, because the mean of its divisors is an integer number (204312240).

Almost surely, 2^3945989342 is an apocalyptic number.

3945989342 is a deficient number, since it is larger than the sum of its proper divisors (2592002338).

3945989342 is a wasteful number, since it uses less digits than its factorization.

3945989342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68888.

The product of its digits is 8398080, while the sum is 56.

The square root of 3945989342 is about 62817.1102646405. The cubic root of 3945989342 is about 1580.2239363737.

The spelling of 3945989342 in words is "three billion, nine hundred forty-five million, nine hundred eighty-nine thousand, three hundred forty-two".