678156 has 24 divisors (see below), whose sum is σ = 1634304. Its totient is φ = 218640.

The previous prime is 678133. The next prime is 678157. The reversal of 678156 is 651876.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 678156.

It is not an unprimeable number, because it can be changed into a prime (678157) by changing a digit.

678156 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 540 + ... + 1283.

It is an arithmetic number, because the mean of its divisors is an integer number (68096).

2⁶⁷⁸¹⁵⁶ is an apocalyptic number.

It is an amenable number.

678156 is an abundant number, since it is smaller than the sum of its proper divisors (956148).

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

678156 is a wasteful number, since it uses less digits than its factorization.

678156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1861 (or 1859 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 678156 is about 823.5022768639. The cubic root of 678156 is about 87.8570337005.

The spelling of 678156 in words is "six hundred seventy-eight thousand, one hundred fifty-six".