3259216720 has 20 divisors (see below), whose sum is σ = 7577679060. Its totient is φ = 1303686656.

The previous prime is 3259216703. The next prime is 3259216721. The reversal of 3259216720 is 276129523.

It can be written as a sum of positive squares in 2 ways, for example, as 480661776 + 2778554944 = 21924^2 + 52712^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 3259216720.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3259216721) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 20370025 + ... + 20370184.

It is an arithmetic number, because the mean of its divisors is an integer number (378883953).

Almost surely, 2^3259216720 is an apocalyptic number.

It is an amenable number.

3259216720 is an abundant number, since it is smaller than the sum of its proper divisors (4318462340).

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

3259216720 is a wasteful number, since it uses less digits than its factorization.

3259216720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40740222 (or 40740216 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 3259216720 is about 57089.5500069846. The cubic root of 3259216720 is about 1482.6469432440.

The spelling of 3259216720 in words is "three billion, two hundred fifty-nine million, two hundred sixteen thousand, seven hundred twenty".