3939985742 has 32 divisors (see below), whose sum is σ = 7371302400. Its totient is φ = 1534430880.

The previous prime is 3939985729. The next prime is 3939985757. The reversal of 3939985742 is 2475899393.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 593759 + ... + 600357.

It is an arithmetic number, because the mean of its divisors is an integer number (230353200).

Almost surely, 2^3939985742 is an apocalyptic number.

3939985742 is a deficient number, since it is larger than the sum of its proper divisors (3431316658).

3939985742 is a wasteful number, since it uses less digits than its factorization.

3939985742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10496.

The product of its digits is 14696640, while the sum is 59.

The square root of 3939985742 is about 62769.3057313843. The cubic root of 3939985742 is about 1579.4221224304.

The spelling of 3939985742 in words is "three billion, nine hundred thirty-nine million, nine hundred eighty-five thousand, seven hundred forty-two".