7312840805 has 8 divisors (see below), whose sum is σ = 8776092312. Its totient is φ = 5849817088.

The previous prime is 7312840781. The next prime is 7312840807. The reversal of 7312840805 is 5080482137.

It can be written as a sum of positive squares in 4 ways, for example, as 4813636 + 7308027169 = 2194^2 + 85487^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 7312840805 - 2³⁰ = 6239098981 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 (7312840807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24197 + ... + 123333.

It is an arithmetic number, because the mean of its divisors is an integer number (1097011539).

Almost surely, 2^7312840805 is an apocalyptic number.

It is an amenable number.

7312840805 is a deficient number, since it is larger than the sum of its proper divisors (1463251507).

7312840805 is a wasteful number, since it uses less digits than its factorization.

7312840805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113895.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 7312840805 is about 85515.1495642731. The cubic root of 7312840805 is about 1941.0141724077.

The spelling of 7312840805 in words is "seven billion, three hundred twelve million, eight hundred forty thousand, eight hundred five".