678208 has 14 divisors (see below), whose sum is σ = 1345946. Its totient is φ = 339072.

The previous prime is 678203. The next prime is 678211. The reversal of 678208 is 802876.

It can be written as a sum of positive squares in only one way, i.e., 399424 + 278784 = 632^2 + 528^2 .

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 678208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5235 + ... + 5362.

It is an arithmetic number, because the mean of its divisors is an integer number (96139).

2⁶⁷⁸²⁰⁸ is an apocalyptic number.

It is an amenable number.

678208 is a deficient number, since it is larger than the sum of its proper divisors (667738).

678208 is a wasteful number, since it uses less digits than its factorization.

678208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10609 (or 10599 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 678208 is about 823.5338487275. The cubic root of 678208 is about 87.8592792256.

The spelling of 678208 in words is "six hundred seventy-eight thousand, two hundred eight".