678448 has 10 divisors (see below), whose sum is σ = 1314524. Its totient is φ = 339216.

The previous prime is 678437. The next prime is 678451. The reversal of 678448 is 844876.

It is an unprimeable number.

678448 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21186 + ... + 21217.

2⁶⁷⁸⁴⁴⁸ is an apocalyptic number.

It is an amenable number.

678448 is a deficient number, since it is larger than the sum of its proper divisors (636076).

678448 is a wasteful number, since it uses less digits than its factorization.

678448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42411 (or 42405 counting only the distinct ones).

The product of its digits is 43008, while the sum is 37.

The square root of 678448 is about 823.6795493394. The cubic root of 678448 is about 87.8696417006.

It can be divided in two parts, 67 and 8448, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 678448 in words is "six hundred seventy-eight thousand, four hundred forty-eight".