79980000 has 240 divisors, whose sum is σ = 277111296. Its totient is φ = 20160000.

The previous prime is 79979989. The next prime is 79980013. The reversal of 79980000 is 8997.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1859979 + ... + 1860021.

Almost surely, 2^79980000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79980000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138555648).

79980000 is an abundant number, since it is smaller than the sum of its proper divisors (197131296).

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

79980000 is a wasteful number, since it uses less digits than its factorization.

79980000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 79980000 is about 8943.1538061245. The cubic root of 79980000 is about 430.8510277689.

Adding to 79980000 its reverse (8997), we get a palindrome (79988997).

The spelling of 79980000 in words is "seventy-nine million, nine hundred eighty thousand".