3440257805 has 4 divisors (see below), whose sum is σ = 4128309372. Its totient is φ = 2752206240.

The previous prime is 3440257801. The next prime is 3440257823. The reversal of 3440257805 is 5087520443.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 966090724 + 2474167081 = 31082^2 + 49741^2 .

It is not a de Polignac number, because 3440257805 - 2² = 3440257801 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3440257801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344025776 + ... + 344025785.

It is an arithmetic number, because the mean of its divisors is an integer number (1032077343).

Almost surely, 2^3440257805 is an apocalyptic number.

It is an amenable number.

3440257805 is a deficient number, since it is larger than the sum of its proper divisors (688051567).

3440257805 is an equidigital number, since it uses as much as digits as its factorization.

3440257805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688051566.

The product of its (nonzero) digits is 134400, while the sum is 38.

The square root of 3440257805 is about 58653.7109226688. The cubic root of 3440257805 is about 1509.6061726032.

The spelling of 3440257805 in words is "three billion, four hundred forty million, two hundred fifty-seven thousand, eight hundred five".