678798 has 24 divisors (see below), whose sum is σ = 1506648. Its totient is φ = 220752.

The previous prime is 678779. The next prime is 678809. The reversal of 678798 is 897876.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 336 + ... + 1212.

It is an arithmetic number, because the mean of its divisors is an integer number (62777).

678798 is a Friedman number, since it can be written as 877*86*9, using all its digits and the basic arithmetic operations.

2⁶⁷⁸⁷⁹⁸ is an apocalyptic number.

678798 is an abundant number, since it is smaller than the sum of its proper divisors (827850).

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

678798 is a wasteful number, since it uses less digits than its factorization.

678798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928 (or 925 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 678798 is about 823.8919832114. The cubic root of 678798 is about 87.8847492635.

The spelling of 678798 in words is "six hundred seventy-eight thousand, seven hundred ninety-eight".