3205920256 has 120 divisors (see below), whose sum is σ = 8129486376. Its totient is φ = 1248952320.

The previous prime is 3205920247. The next prime is 3205920271. The reversal of 3205920256 is 6520295023.

It is a happy number.

It is a super-2 number, since 2×3205920256² = 20555849375662211072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 270160 + ... + 281776.

Almost surely, 2^3205920256 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 3205920256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4064743188).

3205920256 is an abundant number, since it is smaller than the sum of its proper divisors (4923566120).

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

3205920256 is a wasteful number, since it uses less digits than its factorization.

3205920256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11660 (or 11637 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 3205920256 is about 56620.8464790134. The cubic root of 3205920256 is about 1474.5208066669.

The spelling of 3205920256 in words is "three billion, two hundred five million, nine hundred twenty thousand, two hundred fifty-six".