678394 has 8 divisors (see below), whose sum is σ = 1021248. Its totient is φ = 337980.

The previous prime is 678383. The next prime is 678401. The reversal of 678394 is 493876.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 469 + ... + 1255.

It is an arithmetic number, because the mean of its divisors is an integer number (127656).

2⁶⁷⁸³⁹⁴ is an apocalyptic number.

678394 is a deficient number, since it is larger than the sum of its proper divisors (342854).

678394 is a wasteful number, since it uses less digits than its factorization.

678394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220.

The product of its digits is 36288, while the sum is 37.

The square root of 678394 is about 823.6467689489. The cubic root of 678394 is about 87.8673103568.

It can be divided in two parts, 6 and 78394, that added together give a square (78400 = 280²).

The spelling of 678394 in words is "six hundred seventy-eight thousand, three hundred ninety-four".