11816980 has 24 divisors (see below), whose sum is σ = 28361088. Its totient is φ = 4051488.

The previous prime is 11816977. The next prime is 11816999. The reversal of 11816980 is 8961811.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42064 + ... + 42343.

It is an arithmetic number, because the mean of its divisors is an integer number (1181712).

Almost surely, 2^11816980 is an apocalyptic number.

11816980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11816980 is an abundant number, since it is smaller than the sum of its proper divisors (16544108).

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

11816980 is a wasteful number, since it uses less digits than its factorization.

11816980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84423 (or 84421 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 34.

The square root of 11816980 is about 3437.5834535324. The cubic root of 11816980 is about 227.7729606137.

The spelling of 11816980 in words is "eleven million, eight hundred sixteen thousand, nine hundred eighty".