11818980 has 96 divisors (see below), whose sum is σ = 37699200. Its totient is φ = 3072384.

The previous prime is 11818973. The next prime is 11818999. The reversal of 11818980 is 8981811.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22966 + ... + 23474.

It is an arithmetic number, because the mean of its divisors is an integer number (392700).

Almost surely, 2^11818980 is an apocalyptic number.

11818980 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 11818980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18849600).

11818980 is an abundant number, since it is smaller than the sum of its proper divisors (25880220).

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

11818980 is a wasteful number, since it uses less digits than its factorization.

11818980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570 (or 562 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 36.

The square root of 11818980 is about 3437.8743432534. The cubic root of 11818980 is about 227.7858099267.

The spelling of 11818980 in words is "eleven million, eight hundred eighteen thousand, nine hundred eighty".