7807131338 has 8 divisors (see below), whose sum is σ = 11720857188. Its totient is φ = 3900178944.

The previous prime is 7807131329. The next prime is 7807131379. The reversal of 7807131338 is 8331317087.

It can be written as a sum of positive squares in 2 ways, for example, as 7787533009 + 19598329 = 88247^2 + 4427^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 7807131295 and 7807131304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1690481 + ... + 1695092.

Almost surely, 2^7807131338 is an apocalyptic number.

7807131338 is a deficient number, since it is larger than the sum of its proper divisors (3913725850).

7807131338 is a wasteful number, since it uses less digits than its factorization.

7807131338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3386728.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 7807131338 is about 88357.9726906407. The cubic root of 7807131338 is about 1983.7966924228.

The spelling of 7807131338 in words is "seven billion, eight hundred seven million, one hundred thirty-one thousand, three hundred thirty-eight".