79987798 has 8 divisors (see below), whose sum is σ = 130889160. Its totient is φ = 36358080.

The previous prime is 79987793. The next prime is 79987837. The reversal of 79987798 is 89778997.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79987793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1817883 + ... + 1817926.

It is an arithmetic number, because the mean of its divisors is an integer number (16361145).

Almost surely, 2^79987798 is an apocalyptic number.

79987798 is a deficient number, since it is larger than the sum of its proper divisors (50901362).

79987798 is a wasteful number, since it uses less digits than its factorization.

79987798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3635822.

The product of its digits is 16003008, while the sum is 64.

The square root of 79987798 is about 8943.5897714508. The cubic root of 79987798 is about 430.8650298824.

The spelling of 79987798 in words is "seventy-nine million, nine hundred eighty-seven thousand, seven hundred ninety-eight".