3220605540 has 36 divisors (see below), whose sum is σ = 9769170684. Its totient is φ = 858828096.

The previous prime is 3220605491. The next prime is 3220605547. The reversal of 3220605540 is 455060223.

3220605540 is a `hidden beast` number, since 3 + 2 + 2 + 0 + 605 + 54 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2331730944 + 888874596 = 48288^2 + 29814^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (3220605547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8945947 + ... + 8946306.

Almost surely, 2^3220605540 is an apocalyptic number.

3220605540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3220605540 is an abundant number, since it is smaller than the sum of its proper divisors (6548565144).

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

3220605540 is a wasteful number, since it uses less digits than its factorization.

3220605540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17892268 (or 17892263 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 3220605540 is about 56750.3792057815. The cubic root of 3220605540 is about 1476.7688120251.

Adding to 3220605540 its reverse (455060223), we get a palindrome (3675665763).

The spelling of 3220605540 in words is "three billion, two hundred twenty million, six hundred five thousand, five hundred forty".