3943436642 has 16 divisors (see below), whose sum is σ = 5987341752. Its totient is φ = 1947732480.

The previous prime is 3943436593. The next prime is 3943436677. The reversal of 3943436642 is 2466343493.

It can be written as a sum of positive squares in 4 ways, for example, as 3830248321 + 113188321 = 61889^2 + 10639^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3943436593 and 3943436602.

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 7 ways as a sum of consecutive naturals, for example, 86168 + ... + 123740.

Almost surely, 2^3943436642 is an apocalyptic number.

3943436642 is a deficient number, since it is larger than the sum of its proper divisors (2043905110).

3943436642 is a wasteful number, since it uses less digits than its factorization.

3943436642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38213.

The product of its digits is 1119744, while the sum is 44.

The square root of 3943436642 is about 62796.7884688381. The cubic root of 3943436642 is about 1579.8831086413.

The spelling of 3943436642 in words is "three billion, nine hundred forty-three million, four hundred thirty-six thousand, six hundred forty-two".