823426 has 8 divisors (see below), whose sum is σ = 1277820. Its totient is φ = 397488.

The previous prime is 823421. The next prime is 823447. The reversal of 823426 is 624328.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 724201 + 99225 = 851^2 + 315^2 .

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

It is a nialpdrome in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 823426.

It is not an unprimeable number, because it can be changed into a prime (823421) by changing a digit.

823426 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 3 ways as a sum of consecutive naturals, for example, 7041 + ... + 7156.

2⁸²³⁴²⁶ is an apocalyptic number.

823426 is a deficient number, since it is larger than the sum of its proper divisors (454394).

823426 is a wasteful number, since it uses less digits than its factorization.

823426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14228.

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

The square root of 823426 is about 907.4282340769. The cubic root of 823426 is about 93.7291888621.

The spelling of 823426 in words is "eight hundred twenty-three thousand, four hundred twenty-six".