678012 has 12 divisors (see below), whose sum is σ = 1582056. Its totient is φ = 226000.

The previous prime is 677983. The next prime is 678023. The reversal of 678012 is 210876.

678012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28239 + ... + 28262.

It is an arithmetic number, because the mean of its divisors is an integer number (131838).

2⁶⁷⁸⁰¹² is an apocalyptic number.

It is an amenable number.

678012 is an abundant number, since it is smaller than the sum of its proper divisors (904044).

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

678012 is a wasteful number, since it uses less digits than its factorization.

678012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56508 (or 56506 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 678012 is about 823.4148407698. The cubic root of 678012 is about 87.8508147241.

Adding to 678012 its reverse (210876), we get a palindrome (888888).

The spelling of 678012 in words is "six hundred seventy-eight thousand, twelve".