678404 has 12 divisors (see below), whose sum is σ = 1225728. Its totient is φ = 328200.
The previous prime is 678401. The next prime is 678407. The reversal of 678404 is 404876.
It is an interprime number because it is at equal distance from previous prime (678401) and next prime (678407).
It is not an unprimeable number, because it can be changed into a prime (678401) 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 in 3 ways as a sum of consecutive naturals, for example, 2612 + ... + 2859.
It is an arithmetic number, because the mean of its divisors is an integer number (102144).
2678404 is an apocalyptic number.
It is an amenable number.
678404 is a deficient number, since it is larger than the sum of its proper divisors (547324).
678404 is a wasteful number, since it uses less digits than its factorization.
678404 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 5506 (or 5504 counting only the distinct ones).
The product of its (nonzero) digits is 5376, while the sum is 29.
The square root of 678404 is about 823.6528394900. The cubic root of 678404 is about 87.8677420965.
The spelling of 678404 in words is "six hundred seventy-eight thousand, four hundred four".
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