408823 has 4 divisors (see below), whose sum is σ = 430360. Its totient is φ = 387288.

The previous prime is 408817. The next prime is 408841. The reversal of 408823 is 328804.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 408823 - 2⁹ = 408311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10740 + ... + 10777.

It is an arithmetic number, because the mean of its divisors is an integer number (107590).

2⁴⁰⁸⁸²³ is an apocalyptic number.

408823 is a deficient number, since it is larger than the sum of its proper divisors (21537).

408823 is a wasteful number, since it uses less digits than its factorization.

408823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21536.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 408823 is about 639.3926805962. The cubic root of 408823 is about 74.2184317881.

The spelling of 408823 in words is "four hundred eight thousand, eight hundred twenty-three".