7991487348 has 48 divisors (see below), whose sum is σ = 20107454976. Its totient is φ = 2455701120.

The previous prime is 7991487331. The next prime is 7991487353. The reversal of 7991487348 is 8437841997.

It is a junction number, because it is equal to n+sod(n) for n = 7991487291 and 7991487300.

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, 87453 + ... + 153723.

It is an arithmetic number, because the mean of its divisors is an integer number (418905312).

Almost surely, 2^7991487348 is an apocalyptic number.

7991487348 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

7991487348 is an abundant number, since it is smaller than the sum of its proper divisors (12115967628).

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

7991487348 is a wasteful number, since it uses less digits than its factorization.

7991487348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67064 (or 67062 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 60.

The square root of 7991487348 is about 89395.1192627428. The cubic root of 7991487348 is about 1999.2903605691.

The spelling of 7991487348 in words is "seven billion, nine hundred ninety-one million, four hundred eighty-seven thousand, three hundred forty-eight".