678446 has 4 divisors (see below), whose sum is σ = 1017672. Its totient is φ = 339222.

The previous prime is 678437. The next prime is 678451. The reversal of 678446 is 644876.

678446 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169610 + ... + 169613.

It is an arithmetic number, because the mean of its divisors is an integer number (254418).

2⁶⁷⁸⁴⁴⁶ is an apocalyptic number.

678446 is a deficient number, since it is larger than the sum of its proper divisors (339226).

678446 is a wasteful number, since it uses less digits than its factorization.

678446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339225.

The product of its digits is 32256, while the sum is 35.

The square root of 678446 is about 823.6783352742. The cubic root of 678446 is about 87.8695553567.

The spelling of 678446 in words is "six hundred seventy-eight thousand, four hundred forty-six".