7947791408 has 20 divisors (see below), whose sum is σ = 15895583808. Its totient is φ = 3845705280.

The previous prime is 7947791393. The next prime is 7947791429. The reversal of 7947791408 is 8041977497.

7947791408 is an admirable 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 3 ways as a sum of consecutive naturals, for example, 8011391 + ... + 8012382.

Almost surely, 2^7947791408 is an apocalyptic number.

It is an amenable number.

7947791408 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

7947791408 is a wasteful number, since it uses less digits than its factorization.

7947791408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16023812 (or 16023806 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 56.

The square root of 7947791408 is about 89150.3864714001. The cubic root of 7947791408 is about 1995.6397851712.

The spelling of 7947791408 in words is "seven billion, nine hundred forty-seven million, seven hundred ninety-one thousand, four hundred eight".