7991248 has 40 divisors (see below), whose sum is σ = 16526720. Its totient is φ = 3732480.

The previous prime is 7991239. The next prime is 7991251. The reversal of 7991248 is 8421997.

It is a self number, because there is not a number n which added to its sum of digits gives 7991248.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29353 + ... + 29623.

It is an arithmetic number, because the mean of its divisors is an integer number (413168).

Almost surely, 2^7991248 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 7991248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8263360).

7991248 is an abundant number, since it is smaller than the sum of its proper divisors (8535472).

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

7991248 is a wasteful number, since it uses less digits than its factorization.

7991248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395 (or 389 counting only the distinct ones).

The product of its digits is 36288, while the sum is 40.

The square root of 7991248 is about 2826.8795517319. The cubic root of 7991248 is about 199.9270400541.

The spelling of 7991248 in words is "seven million, nine hundred ninety-one thousand, two hundred forty-eight".