678040 has 64 divisors (see below), whose sum is σ = 1762560. Its totient is φ = 232320.

The previous prime is 678037. The next prime is 678047. The reversal of 678040 is 40876.

It is a junction number, because it is equal to n+sod(n) for n = 677996 and 678014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10087 + ... + 10153.

It is an arithmetic number, because the mean of its divisors is an integer number (27540).

2⁶⁷⁸⁰⁴⁰ 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 678040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (881280).

678040 is an abundant number, since it is smaller than the sum of its proper divisors (1084520).

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

678040 is a wasteful number, since it uses less digits than its factorization.

678040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 678040 is about 823.4318429597. The cubic root of 678040 is about 87.8520240385.

The spelling of 678040 in words is "six hundred seventy-eight thousand, forty".