79988 has 6 divisors (see below), whose sum is σ = 139986. Its totient is φ = 39992.

The previous prime is 79987. The next prime is 79997. The reversal of 79988 is 88997.

It can be written as a sum of positive squares in only one way, i.e., 77284 + 2704 = 278^2 + 52^2 .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 79988.

It is not an unprimeable number, because it can be changed into a prime (79987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9995 + ... + 10002.

It is an arithmetic number, because the mean of its divisors is an integer number (23331).

2⁷⁹⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

79988 is a deficient number, since it is larger than the sum of its proper divisors (59998).

79988 is a wasteful number, since it uses less digits than its factorization.

79988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20001 (or 19999 counting only the distinct ones).

The product of its digits is 36288, while the sum is 41.

The square root of 79988 is about 282.8214984756. The cubic root of 79988 is about 43.0865392582.

Subtracting 79988 from its reverse (88997), we obtain a palindrome (9009).

The spelling of 79988 in words is "seventy-nine thousand, nine hundred eighty-eight".