7991352444 has 48 divisors (see below), whose sum is σ = 18738720000. Its totient is φ = 2650642176.

The previous prime is 7991352407. The next prime is 7991352511. The reversal of 7991352444 is 4442531997.

It is a junction number, because it is equal to n+sod(n) for n = 7991352393 and 7991352402.

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, 2420707 + ... + 2424005.

It is an arithmetic number, because the mean of its divisors is an integer number (390390000).

Almost surely, 2^7991352444 is an apocalyptic number.

It is an amenable number.

7991352444 is an abundant number, since it is smaller than the sum of its proper divisors (10747367556).

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

7991352444 is a wasteful number, since it uses less digits than its factorization.

7991352444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4242 (or 4240 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 48.

The square root of 7991352444 is about 89394.3647217206. The cubic root of 7991352444 is about 1999.2791105237.

The spelling of 7991352444 in words is "seven billion, nine hundred ninety-one million, three hundred fifty-two thousand, four hundred forty-four".