7979447808 has 160 divisors (see below), whose sum is σ = 23697590400. Its totient is φ = 2651056128.

The previous prime is 7979447797. The next prime is 7979447821. The reversal of 7979447808 is 8087449797.

It is a happy number.

7979447808 is a `hidden beast` number, since 79 + 7 + 94 + 478 + 0 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5238535 + ... + 5240057.

It is an arithmetic number, because the mean of its divisors is an integer number (148109940).

Almost surely, 2^7979447808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7979447808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11848795200).

7979447808 is an abundant number, since it is smaller than the sum of its proper divisors (15718142592).

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

7979447808 is a wasteful number, since it uses less digits than its factorization.

7979447808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1929 (or 1907 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 63.

The square root of 7979447808 is about 89327.7549701099. The cubic root of 7979447808 is about 1998.2858485955.

The spelling of 7979447808 in words is "seven billion, nine hundred seventy-nine million, four hundred forty-seven thousand, eight hundred eight".