423826 has 8 divisors (see below), whose sum is σ = 684684. Its totient is φ = 195600.

The previous prime is 423823. The next prime is 423847. The reversal of 423826 is 628324.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 423801 + 25 = 651^2 + 5^2 .

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 423826.

It is not an unprimeable number, because it can be changed into a prime (423823) 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, 8125 + ... + 8176.

2⁴²³⁸²⁶ is an apocalyptic number.

423826 is a deficient number, since it is larger than the sum of its proper divisors (260858).

423826 is a wasteful number, since it uses less digits than its factorization.

423826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16316.

The product of its digits is 2304, while the sum is 25.

The square root of 423826 is about 651.0192009457. The cubic root of 423826 is about 75.1154370475.

Subtracting from 423826 its sum of digits (25), we obtain a square (423801 = 651²).

The spelling of 423826 in words is "four hundred twenty-three thousand, eight hundred twenty-six".