423678 has 16 divisors (see below), whose sum is σ = 853776. Its totient is φ = 140160.

The previous prime is 423667. The next prime is 423697. The reversal of 423678 is 876324.

It is a congruent number.

It is an unprimeable number.

423678 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1300 + ... + 1592.

It is an arithmetic number, because the mean of its divisors is an integer number (53361).

2⁴²³⁶⁷⁸ is an apocalyptic number.

423678 is an abundant number, since it is smaller than the sum of its proper divisors (430098).

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

423678 is a wasteful number, since it uses less digits than its factorization.

423678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539.

The product of its digits is 8064, while the sum is 30.

The square root of 423678 is about 650.9055230984. The cubic root of 423678 is about 75.1066925950.

The spelling of 423678 in words is "four hundred twenty-three thousand, six hundred seventy-eight".