423808 has 64 divisors (see below), whose sum is σ = 1077120. Its totient is φ = 161280.

The previous prime is 423803. The next prime is 423823. The reversal of 423808 is 808324.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×423808² = 359226441728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423803) by changing a digit.

423808 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, 9835 + ... + 9877.

It is an arithmetic number, because the mean of its divisors is an integer number (16830).

2⁴²³⁸⁰⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (538560).

423808 is an abundant number, since it is smaller than the sum of its proper divisors (653312).

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

423808 is a wasteful number, since it uses less digits than its factorization.

423808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75 (or 63 counting only the distinct ones).

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

The square root of 423808 is about 651.0053763219. The cubic root of 423808 is about 75.1143736418.

The spelling of 423808 in words is "four hundred twenty-three thousand, eight hundred eight".