678330 has 24 divisors (see below), whose sum is σ = 1763892. Its totient is φ = 180864.

The previous prime is 678329. The next prime is 678341. The reversal of 678330 is 33876.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 670761 + 7569 = 819^2 + 87^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 678294 and 678303.

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 11 ways as a sum of consecutive naturals, for example, 3679 + ... + 3858.

2⁶⁷⁸³³⁰ is an apocalyptic number.

678330 is an abundant number, since it is smaller than the sum of its proper divisors (1085562).

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

678330 is a wasteful number, since it uses less digits than its factorization.

678330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7550 (or 7547 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 678330 is about 823.6079164263. The cubic root of 678330 is about 87.8645471225.

The spelling of 678330 in words is "six hundred seventy-eight thousand, three hundred thirty".