431678 has 8 divisors (see below), whose sum is σ = 697368. Its totient is φ = 199224.

The previous prime is 431671. The next prime is 431693. The reversal of 431678 is 876134.

431678 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 431678.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8276 + ... + 8327.

It is an arithmetic number, because the mean of its divisors is an integer number (87171).

2⁴³¹⁶⁷⁸ is an apocalyptic number.

431678 is a deficient number, since it is larger than the sum of its proper divisors (265690).

431678 is a wasteful number, since it uses less digits than its factorization.

431678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16618.

The product of its digits is 4032, while the sum is 29.

The square root of 431678 is about 657.0220696445. The cubic root of 431678 is about 75.5764761688.

Subtracting from 431678 its sum of digits (29), we obtain a square (431649 = 657²).

The spelling of 431678 in words is "four hundred thirty-one thousand, six hundred seventy-eight".