3240705805 has 8 divisors (see below), whose sum is σ = 3983697144. Its totient is φ = 2529331200.

The previous prime is 3240705763. The next prime is 3240705817. The reversal of 3240705805 is 5085070423.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 165559689 + 3075146116 = 12867^2 + 55454^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3240705805 - 2¹³ = 3240697613 is a prime.

It is a super-2 number, since 2×3240705805² = 21004348229121396050, which contains 22 as substring.

It is a Duffinian number.

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, 7903956 + ... + 7904365.

It is an arithmetic number, because the mean of its divisors is an integer number (497962143).

Almost surely, 2^3240705805 is an apocalyptic number.

It is an amenable number.

3240705805 is a deficient number, since it is larger than the sum of its proper divisors (742991339).

3240705805 is a wasteful number, since it uses less digits than its factorization.

3240705805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15808367.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 3240705805 is about 56927.1974103767. The cubic root of 3240705805 is about 1479.8346852423.

The spelling of 3240705805 in words is "three billion, two hundred forty million, seven hundred five thousand, eight hundred five".