11309980 has 48 divisors (see below), whose sum is σ = 26218080. Its totient is φ = 4064000.

The previous prime is 11309953. The next prime is 11309999. The reversal of 11309980 is 8990311.

11309980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21966 + ... + 22474.

It is an arithmetic number, because the mean of its divisors is an integer number (546210).

Almost surely, 2^11309980 is an apocalyptic number.

11309980 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 11309980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13109040).

11309980 is an abundant number, since it is smaller than the sum of its proper divisors (14908100).

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

11309980 is a wasteful number, since it uses less digits than its factorization.

11309980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 11309980 is about 3363.0313706536. The cubic root of 11309980 is about 224.4677460223.

The spelling of 11309980 in words is "eleven million, three hundred nine thousand, nine hundred eighty".