79800518 has 48 divisors (see below), whose sum is σ = 147620880. Its totient is φ = 32203584.

The previous prime is 79800517. The next prime is 79800529. The reversal of 79800518 is 81500897.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79800517) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 121880 + ... + 122532.

It is an arithmetic number, because the mean of its divisors is an integer number (3075435).

Almost surely, 2^79800518 is an apocalyptic number.

79800518 is a deficient number, since it is larger than the sum of its proper divisors (67820362).

79800518 is a wasteful number, since it uses less digits than its factorization.

79800518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741 (or 734 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 38.

The square root of 79800518 is about 8933.1135669485. The cubic root of 79800518 is about 430.5284974636.

The spelling of 79800518 in words is "seventy-nine million, eight hundred thousand, five hundred eighteen".