84678198 has 32 divisors (see below), whose sum is σ = 186596352. Its totient is φ = 25404000.

The previous prime is 84678179. The next prime is 84678199. The reversal of 84678198 is 89187648.

It is a self number, because there is not a number n which added to its sum of digits gives 84678198.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84678199) 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 15 ways as a sum of consecutive naturals, for example, 315 + ... + 13017.

It is an arithmetic number, because the mean of its divisors is an integer number (5831136).

Almost surely, 2^84678198 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84678198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93298176).

84678198 is an abundant number, since it is smaller than the sum of its proper divisors (101918154).

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

84678198 is a wasteful number, since it uses less digits than its factorization.

84678198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12820.

The product of its digits is 774144, while the sum is 51.

The square root of 84678198 is about 9202.0757440917. The cubic root of 84678198 is about 439.1273994050.

The spelling of 84678198 in words is "eighty-four million, six hundred seventy-eight thousand, one hundred ninety-eight".