678498 has 8 divisors (see below), whose sum is σ = 1357008. Its totient is φ = 226164.

The previous prime is 678493. The next prime is 678499. The reversal of 678498 is 894876.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

678498 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (678493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56536 + ... + 56547.

It is an arithmetic number, because the mean of its divisors is an integer number (169626).

2⁶⁷⁸⁴⁹⁸ is an apocalyptic number.

678498 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.

678498 is a wasteful number, since it uses less digits than its factorization.

678498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113088.

The product of its digits is 96768, while the sum is 42.

The square root of 678498 is about 823.7099003897. The cubic root of 678498 is about 87.8718002419.

It can be divided in two parts, 678 and 498, that added together give a triangular number (1176 = T₄₈).

The spelling of 678498 in words is "six hundred seventy-eight thousand, four hundred ninety-eight".