7839920904 has 64 divisors (see below), whose sum is σ = 20691244800. Its totient is φ = 2468579904.

The previous prime is 7839920897. The next prime is 7839920917. The reversal of 7839920904 is 4090299387.

It is a super-2 number, since 2×7839920904² (a number of 21 digits) contains 22 as substring.

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, 133459 + ... + 183005.

It is an arithmetic number, because the mean of its divisors is an integer number (323300700).

Almost surely, 2^7839920904 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 7839920904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10345622400).

7839920904 is an abundant number, since it is smaller than the sum of its proper divisors (12851323896).

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

7839920904 is a wasteful number, since it uses less digits than its factorization.

7839920904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49922 (or 49918 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 7839920904 is about 88543.3278344563. The cubic root of 7839920904 is about 1986.5700960270.

The spelling of 7839920904 in words is "seven billion, eight hundred thirty-nine million, nine hundred twenty thousand, nine hundred four".