11989908 has 72 divisors (see below), whose sum is σ = 35380800. Its totient is φ = 3422160.

The previous prime is 11989897. The next prime is 11989919. The reversal of 11989908 is 80998911.

It is an interprime number because it is at equal distance from previous prime (11989897) and next prime (11989919).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11863 + ... + 12833.

It is an arithmetic number, because the mean of its divisors is an integer number (491400).

Almost surely, 2^11989908 is an apocalyptic number.

11989908 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 11989908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17690400).

11989908 is an abundant number, since it is smaller than the sum of its proper divisors (23390892).

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

11989908 is a wasteful number, since it uses less digits than its factorization.

11989908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002 (or 983 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 45.

The square root of 11989908 is about 3462.6446540181. The cubic root of 11989908 is about 228.8786501985.

The spelling of 11989908 in words is "eleven million, nine hundred eighty-nine thousand, nine hundred eight".