3208643680 has 48 divisors (see below), whose sum is σ = 8269554384. Its totient is φ = 1166778880.

The previous prime is 3208643651. The next prime is 3208643687. The reversal of 3208643680 is 863468023.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3208643687) 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, 909787 + ... + 913306.

It is an arithmetic number, because the mean of its divisors is an integer number (172282383).

Almost surely, 2^3208643680 is an apocalyptic number.

It is an amenable number.

3208643680 is an abundant number, since it is smaller than the sum of its proper divisors (5060910704).

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

3208643680 is a wasteful number, since it uses less digits than its factorization.

3208643680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823119 (or 1823111 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 40.

The square root of 3208643680 is about 56644.8910317603. The cubic root of 3208643680 is about 1474.9382228268.

The spelling of 3208643680 in words is "three billion, two hundred eight million, six hundred forty-three thousand, six hundred eighty".