16001808 has 80 divisors (see below), whose sum is σ = 43497216. Its totient is φ = 5063680.

The previous prime is 16001801. The next prime is 16001809. The reversal of 16001808 is 80810061.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (16001801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92410 + ... + 92582.

Almost surely, 2^16001808 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 16001808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21748608).

16001808 is an abundant number, since it is smaller than the sum of its proper divisors (27495408).

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

16001808 is a wasteful number, since it uses less digits than its factorization.

16001808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 16001808 is about 4000.2259936159. The cubic root of 16001808 is about 251.9937010267.

Adding to 16001808 its reverse (80810061), we get a palindrome (96811869).

The spelling of 16001808 in words is "sixteen million, one thousand, eight hundred eight".