11812980 has 96 divisors (see below), whose sum is σ = 34836480. Its totient is φ = 2988160.

The previous prime is 11812963. The next prime is 11812981. The reversal of 11812980 is 8921811.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11812981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166345 + ... + 166415.

It is an arithmetic number, because the mean of its divisors is an integer number (362880).

Almost surely, 2^11812980 is an apocalyptic number.

11812980 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 11812980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17418240).

11812980 is an abundant number, since it is smaller than the sum of its proper divisors (23023500).

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

11812980 is a wasteful number, since it uses less digits than its factorization.

11812980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 30.

The square root of 11812980 is about 3437.0016002324. The cubic root of 11812980 is about 227.7472576377.

The spelling of 11812980 in words is "eleven million, eight hundred twelve thousand, nine hundred eighty".