678351 has 16 divisors (see below), whose sum is σ = 981504. Its totient is φ = 415104.

The previous prime is 678343. The next prime is 678367. The reversal of 678351 is 153876.

678351 = 34² + 35² + ... + 127².

It is not a de Polignac number, because 678351 - 2³ = 678343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2256 + ... + 2538.

It is an arithmetic number, because the mean of its divisors is an integer number (61344).

2⁶⁷⁸³⁵¹ is an apocalyptic number.

678351 is a deficient number, since it is larger than the sum of its proper divisors (303153).

678351 is a wasteful number, since it uses less digits than its factorization.

678351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350.

The product of its digits is 5040, while the sum is 30.

The square root of 678351 is about 823.6206651123. The cubic root of 678351 is about 87.8654538279.

The spelling of 678351 in words is "six hundred seventy-eight thousand, three hundred fifty-one".