678140 has 24 divisors (see below), whose sum is σ = 1460592. Its totient is φ = 264320.

The previous prime is 678133. The next prime is 678157. The reversal of 678140 is 41876.

It is an Ulam number.

It is a congruent number.

It is an unprimeable 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 7 ways as a sum of consecutive naturals, for example, 407 + ... + 1233.

It is an arithmetic number, because the mean of its divisors is an integer number (60858).

2⁶⁷⁸¹⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (730296).

678140 is an abundant number, since it is smaller than the sum of its proper divisors (782452).

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

678140 is a wasteful number, since it uses less digits than its factorization.

678140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877 (or 875 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 678140 is about 823.4925622008. The cubic root of 678140 is about 87.8563427466.

It can be divided in two parts, 678 and 140, that added together give a palindrome (818).

The spelling of 678140 in words is "six hundred seventy-eight thousand, one hundred forty".