3216475720 has 16 divisors (see below), whose sum is σ = 7237070460. Its totient is φ = 1286590272.

The previous prime is 3216475709. The next prime is 3216475727. The reversal of 3216475720 is 275746123.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3018623364 + 197852356 = 54942^2 + 14066^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3216475720.

It is not an unprimeable number, because it can be changed into a prime (3216475727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40205907 + ... + 40205986.

Almost surely, 2^3216475720 is an apocalyptic number.

It is an amenable number.

3216475720 is an abundant number, since it is smaller than the sum of its proper divisors (4020594740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3216475720 is a wasteful number, since it uses less digits than its factorization.

3216475720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80411904 (or 80411900 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 3216475720 is about 56713.9816976378. The cubic root of 3216475720 is about 1476.1373160732.

The spelling of 3216475720 in words is "three billion, two hundred sixteen million, four hundred seventy-five thousand, seven hundred twenty".