3960435644 has 12 divisors (see below), whose sum is σ = 7560831768. Its totient is φ = 1800198000.

The previous prime is 3960435643. The next prime is 3960435649. The reversal of 3960435644 is 4465340693.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 90009901 = 3960435644 / (3 + 9 + 6 + 0 + 4 + 3 + 5 + 6 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 3960435595 and 3960435604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3960435641) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 45004907 + ... + 45004994.

It is an arithmetic number, because the mean of its divisors is an integer number (630069314).

Almost surely, 2^3960435644 is an apocalyptic number.

It is an amenable number.

3960435644 is a deficient number, since it is larger than the sum of its proper divisors (3600396124).

3960435644 is a wasteful number, since it uses less digits than its factorization.

3960435644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90009916 (or 90009914 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 44.

The square root of 3960435644 is about 62931.9922138176. The cubic root of 3960435644 is about 1582.1499924645.

The spelling of 3960435644 in words is "three billion, nine hundred sixty million, four hundred thirty-five thousand, six hundred forty-four".