678946 has 16 divisors (see below), whose sum is σ = 1136160. Its totient is φ = 302400.

The previous prime is 678943. The next prime is 678949. The reversal of 678946 is 649876.

It is an interprime number because it is at equal distance from previous prime (678943) and next prime (678949).

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 678899 and 678908.

It is not an unprimeable number, because it can be changed into a prime (678941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121 + ... + 1171.

It is an arithmetic number, because the mean of its divisors is an integer number (71010).

2⁶⁷⁸⁹⁴⁶ is an apocalyptic number.

678946 is a deficient number, since it is larger than the sum of its proper divisors (457214).

678946 is a wasteful number, since it uses less digits than its factorization.

678946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089.

The product of its digits is 72576, while the sum is 40.

The square root of 678946 is about 823.9817959154. The cubic root of 678946 is about 87.8911360421.

The spelling of 678946 in words is "six hundred seventy-eight thousand, nine hundred forty-six".