7840491305 has 8 divisors (see below), whose sum is σ = 9541105344. Its totient is φ = 6184049200.

The previous prime is 7840491277. The next prime is 7840491311. The reversal of 7840491305 is 5031940487.

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

It is not a de Polignac number, because 7840491305 - 2²⁰ = 7839442729 is a prime.

It is a super-2 number, since 2×7840491305² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11042591 + ... + 11043300.

It is an arithmetic number, because the mean of its divisors is an integer number (1192638168).

Almost surely, 2^7840491305 is an apocalyptic number.

It is an amenable number.

7840491305 is a deficient number, since it is larger than the sum of its proper divisors (1700614039).

7840491305 is a wasteful number, since it uses less digits than its factorization.

7840491305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22085967.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 7840491305 is about 88546.5488034401. The cubic root of 7840491305 is about 1986.6182731325.

The spelling of 7840491305 in words is "seven billion, eight hundred forty million, four hundred ninety-one thousand, three hundred five".