678674 has 8 divisors (see below), whose sum is σ = 1077948. Its totient is φ = 319360.

The previous prime is 678659. The next prime is 678719. The reversal of 678674 is 476876.

It can be written as a sum of positive squares in 2 ways, for example, as 573049 + 105625 = 757^2 + 325^2 .

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, 9947 + ... + 10014.

2⁶⁷⁸⁶⁷⁴ is an apocalyptic number.

678674 is a deficient number, since it is larger than the sum of its proper divisors (399274).

678674 is a wasteful number, since it uses less digits than its factorization.

678674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19980.

The product of its digits is 56448, while the sum is 38.

The square root of 678674 is about 823.8167271912. The cubic root of 678674 is about 87.8793974639.

Subtracting from 678674 its product of digits (56448), we obtain a palindrome (622226).

The spelling of 678674 in words is "six hundred seventy-eight thousand, six hundred seventy-four".