3220534640 has 40 divisors (see below), whose sum is σ = 7491538368. Its totient is φ = 1287560960.

The previous prime is 3220534633. The next prime is 3220534663. The reversal of 3220534640 is 464350223.

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, 167945 + ... + 186135.

Almost surely, 2^3220534640 is an apocalyptic number.

It is an amenable number.

3220534640 is an abundant number, since it is smaller than the sum of its proper divisors (4271003728).

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

3220534640 is a wasteful number, since it uses less digits than its factorization.

3220534640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20417 (or 20411 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 29.

The square root of 3220534640 is about 56749.7545369141. The cubic root of 3220534640 is about 1476.7579751730.

Adding to 3220534640 its reverse (464350223), we get a palindrome (3684884863).

The spelling of 3220534640 in words is "three billion, two hundred twenty million, five hundred thirty-four thousand, six hundred forty".