11999680 has 112 divisors (see below), whose sum is σ = 35698176. Its totient is φ = 3732480.

The previous prime is 11999657. The next prime is 11999681. The reversal of 11999680 is 8699911.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11999681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24397 + ... + 24883.

Almost surely, 2^11999680 is an apocalyptic number.

11999680 is a gapful number since it is divisible by the number (10) 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 11999680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17849088).

11999680 is an abundant number, since it is smaller than the sum of its proper divisors (23698496).

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

11999680 is a wasteful number, since it uses less digits than its factorization.

11999680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 43.

The square root of 11999680 is about 3464.0554268083. The cubic root of 11999680 is about 228.9408134450.

It can be divided in two parts, 119 and 99680, that added together give a palindrome (99799).

The spelling of 11999680 in words is "eleven million, nine hundred ninety-nine thousand, six hundred eighty".