7998008992 has 12 divisors (see below), whose sum is σ = 15746080266. Its totient is φ = 3999004480.

The previous prime is 7998008981. The next prime is 7998009001. The reversal of 7998008992 is 2998008997.

It can be written as a sum of positive squares in only one way, i.e., 6330430096 + 1667578896 = 79564^2 + 40836^2 .

It is a super-2 number, since 2×7998008992² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7998008992.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124968859 + ... + 124968922.

Almost surely, 2^7998008992 is an apocalyptic number.

It is an amenable number.

7998008992 is a deficient number, since it is larger than the sum of its proper divisors (7748071274).

7998008992 is a wasteful number, since it uses less digits than its factorization.

7998008992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249937791 (or 249937783 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 61.

The square root of 7998008992 is about 89431.5883343240. The cubic root of 7998008992 is about 1999.8340689005.

The spelling of 7998008992 in words is "seven billion, nine hundred ninety-eight million, eight thousand, nine hundred ninety-two".