678716 has 12 divisors (see below), whose sum is σ = 1228920. Its totient is φ = 327600.

The previous prime is 678659. The next prime is 678719. The reversal of 678716 is 617876.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678719) by changing a digit.

678716 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 3 ways as a sum of consecutive naturals, for example, 2810 + ... + 3041.

It is an arithmetic number, because the mean of its divisors is an integer number (102410).

2⁶⁷⁸⁷¹⁶ is an apocalyptic number.

It is an amenable number.

678716 is a deficient number, since it is larger than the sum of its proper divisors (550204).

678716 is a wasteful number, since it uses less digits than its factorization.

678716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5884 (or 5882 counting only the distinct ones).

The product of its digits is 14112, while the sum is 35.

The square root of 678716 is about 823.8422179034. The cubic root of 678716 is about 87.8812102432.

The spelling of 678716 in words is "six hundred seventy-eight thousand, seven hundred sixteen".