3205020405 has 32 divisors (see below), whose sum is σ = 5476008960. Its totient is φ = 1597155840.

The previous prime is 3205020367. The next prime is 3205020407. The reversal of 3205020405 is 5040205023.

It is not a de Polignac number, because 3205020405 - 2⁶ = 3205020341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3205020407) 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 31 ways as a sum of consecutive naturals, for example, 105352 + ... + 132321.

It is an arithmetic number, because the mean of its divisors is an integer number (171125280).

Almost surely, 2^3205020405 is an apocalyptic number.

It is an amenable number.

3205020405 is a deficient number, since it is larger than the sum of its proper divisors (2270988555).

3205020405 is a wasteful number, since it uses less digits than its factorization.

3205020405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237741.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 3205020405 is about 56612.8996342706. The cubic root of 3205020405 is about 1474.3828355512.

Adding to 3205020405 its reverse (5040205023), we get a palindrome (8245225428).

The spelling of 3205020405 in words is "three billion, two hundred five million, twenty thousand, four hundred five".