3221362640 has 40 divisors (see below), whose sum is σ = 7930240200. Its totient is φ = 1212747776.

The previous prime is 3221362633. The next prime is 3221362679. The reversal of 3221362640 is 462631223.

It can be written as a sum of positive squares in 4 ways, for example, as 374499904 + 2846862736 = 19352^2 + 53356^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1182965 + ... + 1185684.

It is an arithmetic number, because the mean of its divisors is an integer number (198256005).

Almost surely, 2^3221362640 is an apocalyptic number.

It is an amenable number.

3221362640 is an abundant number, since it is smaller than the sum of its proper divisors (4708877560).

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

3221362640 is a wasteful number, since it uses less digits than its factorization.

3221362640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2368679 (or 2368673 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 3221362640 is about 56757.0492538152. The cubic root of 3221362640 is about 1476.8845225702.

Adding to 3221362640 its reverse (462631223), we get a palindrome (3683993863).

The spelling of 3221362640 in words is "three billion, two hundred twenty-one million, three hundred sixty-two thousand, six hundred forty".