3256388720 has 160 divisors (see below), whose sum is σ = 8632780800. Its totient is φ = 1132434432.

The previous prime is 3256388719. The next prime is 3256388747. The reversal of 3256388720 is 278836523.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4406111 + ... + 4406849.

It is an arithmetic number, because the mean of its divisors is an integer number (53954880).

Almost surely, 2^3256388720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3256388720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4316390400).

3256388720 is an abundant number, since it is smaller than the sum of its proper divisors (5376392080).

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

3256388720 is a wasteful number, since it uses less digits than its factorization.

3256388720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007 (or 1001 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 44.

The square root of 3256388720 is about 57064.7765263301. The cubic root of 3256388720 is about 1482.2179916251.

The spelling of 3256388720 in words is "three billion, two hundred fifty-six million, three hundred eighty-eight thousand, seven hundred twenty".