678354 has 16 divisors (see below), whose sum is σ = 1366848. Its totient is φ = 224432.

The previous prime is 678343. The next prime is 678367. The reversal of 678354 is 453876.

678354 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 664 + ... + 1340.

It is an arithmetic number, because the mean of its divisors is an integer number (85428).

2⁶⁷⁸³⁵⁴ is an apocalyptic number.

678354 is an abundant number, since it is smaller than the sum of its proper divisors (688494).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

678354 is a wasteful number, since it uses less digits than its factorization.

678354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849.

The product of its digits is 20160, while the sum is 33.

The square root of 678354 is about 823.6224863370. The cubic root of 678354 is about 87.8655833557.

The spelling of 678354 in words is "six hundred seventy-eight thousand, three hundred fifty-four".