815808 has 56 divisors (see below), whose sum is σ = 2470912. Its totient is φ = 232704.

The previous prime is 815729. The next prime is 815809. The reversal of 815808 is 808518.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815809) by changing a digit.

815808 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, 1041 + ... + 1647.

2⁸¹⁵⁸⁰⁸ 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 815808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1235456).

815808 is an abundant number, since it is smaller than the sum of its proper divisors (1655104).

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

815808 is a wasteful number, since it uses less digits than its factorization.

815808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629 (or 619 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 30.

The square root of 815808 is about 903.2209032125. The cubic root of 815808 is about 93.4392448491.

The spelling of 815808 in words is "eight hundred fifteen thousand, eight hundred eight".