7994968128 has 84 divisors (see below), whose sum is σ = 26189879040. Its totient is φ = 2284275456.

The previous prime is 7994968109. The next prime is 7994968129. The reversal of 7994968128 is 8218694997.

It is a tau number, because it is divible by the number of its divisors (84).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (7994968129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 987408 + ... + 995471.

Almost surely, 2^7994968128 is an apocalyptic number.

It is an amenable number.

7994968128 is an abundant number, since it is smaller than the sum of its proper divisors (18194910912).

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

7994968128 is a wasteful number, since it uses less digits than its factorization.

7994968128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982904 (or 1982891 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 63.

The square root of 7994968128 is about 89414.5856558090. The cubic root of 7994968128 is about 1999.5805893869.

The spelling of 7994968128 in words is "seven billion, nine hundred ninety-four million, nine hundred sixty-eight thousand, one hundred twenty-eight".