78999198 has 16 divisors (see below), whose sum is σ = 161360640. Its totient is φ = 25772696.

The previous prime is 78999163. The next prime is 78999223. The reversal of 78999198 is 89199987.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139788 + ... + 140351.

It is an arithmetic number, because the mean of its divisors is an integer number (10085040).

Almost surely, 2^78999198 is an apocalyptic number.

78999198 is an abundant number, since it is smaller than the sum of its proper divisors (82361442).

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

78999198 is a wasteful number, since it uses less digits than its factorization.

78999198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280191.

The product of its digits is 2939328, while the sum is 60.

The square root of 78999198 is about 8888.1493011763. The cubic root of 78999198 is about 429.0825906918.

It can be divided in two parts, 78999 and 198, that added together give a palindrome (79197).

The spelling of 78999198 in words is "seventy-eight million, nine hundred ninety-nine thousand, one hundred ninety-eight".