78198 has 8 divisors (see below), whose sum is σ = 156408. Its totient is φ = 26064.
The previous prime is 78193. The next prime is 78203. The reversal of 78198 is 89187.
It is an interprime number because it is at equal distance from previous prime (78193) and next prime (78203).
It is a sphenic number, since it is the product of 3 distinct primes.
78198 is an admirable number.
It is a super-2 number, since 2×781982 = 12229854408, which contains 22 as substring.
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 78198.
It is not an unprimeable number, because it can be changed into a prime (78191) by changing a digit.
78198 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6511 + ... + 6522.
It is an arithmetic number, because the mean of its divisors is an integer number (19551).
278198 is an apocalyptic number.
78198 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78204).
78198 is a wasteful number, since it uses less digits than its factorization.
78198 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 13038.
The product of its digits is 4032, while the sum is 33.
The square root of 78198 is about 279.6390530666. The cubic root of 78198 is about 42.7627095346.
It can be divided in two parts, 78 and 198, that added together give a triangular number (276 = T23).
The spelling of 78198 in words is "seventy-eight thousand, one hundred ninety-eight".
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