7931243620 has 24 divisors (see below), whose sum is σ = 16675082424. Its totient is φ = 3168788736.

The previous prime is 7931243609. The next prime is 7931243641. The reversal of 7931243620 is 263421397.

It can be written as a sum of positive squares in 4 ways, for example, as 2810696256 + 5120547364 = 53016^2 + 71558^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7931243620.

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, 214227 + ... + 248506.

It is an arithmetic number, because the mean of its divisors is an integer number (694795101).

Almost surely, 2^7931243620 is an apocalyptic number.

It is an amenable number.

7931243620 is an abundant number, since it is smaller than the sum of its proper divisors (8743838804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7931243620 is a wasteful number, since it uses less digits than its factorization.

7931243620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463599 (or 463597 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 7931243620 is about 89057.5298332488. The cubic root of 7931243620 is about 1994.2538081171.

The spelling of 7931243620 in words is "seven billion, nine hundred thirty-one million, two hundred forty-three thousand, six hundred twenty".