3967212644 has 24 divisors (see below), whose sum is σ = 7357203000. Its totient is φ = 1868491520.

The previous prime is 3967212617. The next prime is 3967212649. The reversal of 3967212644 is 4462127693.

It can be written as a sum of positive squares in 4 ways, for example, as 380640100 + 3586572544 = 19510^2 + 59888^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3967212595 and 3967212604.

It is not an unprimeable number, because it can be changed into a prime (3967212649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412319 + ... + 421830.

It is an arithmetic number, because the mean of its divisors is an integer number (306550125).

Almost surely, 2^3967212644 is an apocalyptic number.

It is an amenable number.

3967212644 is a deficient number, since it is larger than the sum of its proper divisors (3389990356).

3967212644 is a wasteful number, since it uses less digits than its factorization.

3967212644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834223 (or 834221 counting only the distinct ones).

The product of its digits is 435456, while the sum is 44.

The square root of 3967212644 is about 62985.8130375404. The cubic root of 3967212644 is about 1583.0519235816.

The spelling of 3967212644 in words is "three billion, nine hundred sixty-seven million, two hundred twelve thousand, six hundred forty-four".