678930 has 64 divisors (see below), whose sum is σ = 1928448. Its totient is φ = 149760.

The previous prime is 678907. The next prime is 678941. The reversal of 678930 is 39876.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 678891 and 678900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11100 + ... + 11160.

It is an arithmetic number, because the mean of its divisors is an integer number (30132).

2⁶⁷⁸⁹³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (964224).

678930 is an abundant number, since it is smaller than the sum of its proper divisors (1249518).

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

678930 is a wasteful number, since it uses less digits than its factorization.

678930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 678930 is about 823.9720869059. The cubic root of 678930 is about 87.8904456243.

The spelling of 678930 in words is "six hundred seventy-eight thousand, nine hundred thirty".