11501980 has 48 divisors (see below), whose sum is σ = 28566720. Its totient is φ = 3806208.

The previous prime is 11501881. The next prime is 11502019. The reversal of 11501980 is 8910511.

11501980 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, 2644 + ... + 5476.

It is an arithmetic number, because the mean of its divisors is an integer number (595140).

Almost surely, 2^11501980 is an apocalyptic number.

11501980 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 11501980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14283360).

11501980 is an abundant number, since it is smaller than the sum of its proper divisors (17064740).

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

11501980 is a wasteful number, since it uses less digits than its factorization.

11501980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2878 (or 2876 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 25.

The square root of 11501980 is about 3391.4569140710. The cubic root of 11501980 is about 225.7308252734.

The spelling of 11501980 in words is "eleven million, five hundred one thousand, nine hundred eighty".