3221647840 has 48 divisors (see below), whose sum is σ = 7621432560. Its totient is φ = 1286917120.

The previous prime is 3221647837. The next prime is 3221647841. The reversal of 3221647840 is 487461223.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 3221647840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221647841) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 108531 + ... + 134989.

It is an arithmetic number, because the mean of its divisors is an integer number (158779845).

Almost surely, 2^3221647840 is an apocalyptic number.

It is an amenable number.

3221647840 is an abundant number, since it is smaller than the sum of its proper divisors (4399784720).

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

3221647840 is a wasteful number, since it uses less digits than its factorization.

3221647840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27235 (or 27227 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 3221647840 is about 56759.5616614505. The cubic root of 3221647840 is about 1476.9281060971.

The spelling of 3221647840 in words is "three billion, two hundred twenty-one million, six hundred forty-seven thousand, eight hundred forty".