3240405005 has 16 divisors (see below), whose sum is σ = 3937474800. Its totient is φ = 2559744000.

The previous prime is 3240404977. The next prime is 3240405011. The reversal of 3240405005 is 5005040423.

It can be written as a sum of positive squares in 8 ways, for example, as 122522761 + 3117882244 = 11069^2 + 55838^2 .

It is not a de Polignac number, because 3240405005 - 2¹⁸ = 3240142861 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 355505 + ... + 364505.

It is an arithmetic number, because the mean of its divisors is an integer number (246092175).

Almost surely, 2^3240405005 is an apocalyptic number.

It is an amenable number.

3240405005 is a deficient number, since it is larger than the sum of its proper divisors (697069795).

3240405005 is an equidigital number, since it uses as much as digits as its factorization.

3240405005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9904.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 3240405005 is about 56924.5553781494. Note that the first 3 decimals coincide. The cubic root of 3240405005 is about 1479.7888980925.

Adding to 3240405005 its reverse (5005040423), we get a palindrome (8245445428).

The spelling of 3240405005 in words is "three billion, two hundred forty million, four hundred five thousand, five".