678435 has 16 divisors (see below), whose sum is σ = 1121280. Its totient is φ = 349920.

The previous prime is 678421. The next prime is 678437. The reversal of 678435 is 534876.

It is not a de Polignac number, because 678435 - 2⁶ = 678371 is a prime.

678435 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 678396 and 678405.

It is not an unprimeable number, because it can be changed into a prime (678437) 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, 265 + ... + 1194.

It is an arithmetic number, because the mean of its divisors is an integer number (70080).

2⁶⁷⁸⁴³⁵ is an apocalyptic number.

678435 is a deficient number, since it is larger than the sum of its proper divisors (442845).

678435 is a wasteful number, since it uses less digits than its factorization.

678435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498.

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

The square root of 678435 is about 823.6716578832. The cubic root of 678435 is about 87.8690804625.

The spelling of 678435 in words is "six hundred seventy-eight thousand, four hundred thirty-five".