3216440072 has 32 divisors (see below), whose sum is σ = 6099141720. Its totient is φ = 1590036480.

The previous prime is 3216440053. The next prime is 3216440077. The reversal of 3216440072 is 2700446123.

It can be written as a sum of positive squares in 4 ways, for example, as 2913192676 + 303247396 = 53974^2 + 17414^2 .

It is not an unprimeable number, because it can be changed into a prime (3216440077) 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, 1256618 + ... + 1259174.

Almost surely, 2^3216440072 is an apocalyptic number.

It is an amenable number.

3216440072 is a deficient number, since it is larger than the sum of its proper divisors (2882701648).

3216440072 is a wasteful number, since it uses less digits than its factorization.

3216440072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4281 (or 4277 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 3216440072 is about 56713.6674180043. The cubic root of 3216440072 is about 1476.1318627404.

Adding to 3216440072 its reverse (2700446123), we get a palindrome (5916886195).

The spelling of 3216440072 in words is "three billion, two hundred sixteen million, four hundred forty thousand, seventy-two".