7991628944 has 40 divisors (see below), whose sum is σ = 17399844672. Its totient is φ = 3528074880.

The previous prime is 7991628929. The next prime is 7991628959. The reversal of 7991628944 is 4498261997.

It is an interprime number because it is at equal distance from previous prime (7991628929) and next prime (7991628959).

It is a super-2 number, since 2×7991628944² (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 7 ways as a sum of consecutive naturals, for example, 830462 + ... + 840029.

Almost surely, 2^7991628944 is an apocalyptic number.

It is an amenable number.

7991628944 is an abundant number, since it is smaller than the sum of its proper divisors (9408215728).

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

7991628944 is a wasteful number, since it uses less digits than its factorization.

7991628944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670535 (or 1670529 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 59.

The square root of 7991628944 is about 89395.9112264090. The cubic root of 7991628944 is about 1999.3021685439.

The spelling of 7991628944 in words is "seven billion, nine hundred ninety-one million, six hundred twenty-eight thousand, nine hundred forty-four".