7897667988 has 24 divisors (see below), whose sum is σ = 21060448192. Its totient is φ = 2256476544.

The previous prime is 7897667963. The next prime is 7897668001. The reversal of 7897667988 is 8897667987.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47009845 + ... + 47010012.

Almost surely, 2^7897667988 is an apocalyptic number.

It is an amenable number.

7897667988 is an abundant number, since it is smaller than the sum of its proper divisors (13162780204).

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

7897667988 is a wasteful number, since it uses less digits than its factorization.

7897667988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94019871 (or 94019869 counting only the distinct ones).

The product of its digits is 512096256, while the sum is 75.

The square root of 7897667988 is about 88868.8246124590. The cubic root of 7897667988 is about 1991.4357111588.

Subtracting 7897667988 from its reverse (8897667987), we obtain a palindrome (999999999).

The spelling of 7897667988 in words is "seven billion, eight hundred ninety-seven million, six hundred sixty-seven thousand, nine hundred eighty-eight".