12017808 has 120 divisors (see below), whose sum is σ = 38185056. Its totient is φ = 3628800.

The previous prime is 12017807. The next prime is 12017813. The reversal of 12017808 is 80871021.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12017807) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42628 + ... + 42908.

Almost surely, 2^12017808 is an apocalyptic number.

12017808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12017808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19092528).

12017808 is an abundant number, since it is smaller than the sum of its proper divisors (26167248).

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

12017808 is a wasteful number, since it uses less digits than its factorization.

12017808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 12017808 is about 3466.6710256383. The cubic root of 12017808 is about 229.0560429313.

Adding to 12017808 its reverse (80871021), we get a palindrome (92888829).

It can be divided in two parts, 1201 and 7808, that added together give a palindrome (9009).

The spelling of 12017808 in words is "twelve million, seventeen thousand, eight hundred eight".