678890106 has 64 divisors (see below), whose sum is σ = 1569363840. Its totient is φ = 217365120.

The previous prime is 678890071. The next prime is 678890119. The reversal of 678890106 is 601098876.

It is a happy number.

678890106 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139246 + ... + 144038.

It is an arithmetic number, because the mean of its divisors is an integer number (24521310).

Almost surely, 2^678890106 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678890106, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (784681920).

678890106 is an abundant number, since it is smaller than the sum of its proper divisors (890473734).

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

678890106 is a wasteful number, since it uses less digits than its factorization.

678890106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4908 (or 4902 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 678890106 is about 26055.5196839365. The cubic root of 678890106 is about 878.8872410659.

The spelling of 678890106 in words is "six hundred seventy-eight million, eight hundred ninety thousand, one hundred six".