11117980 has 24 divisors (see below), whose sum is σ = 23699088. Its totient is φ = 4380288.

The previous prime is 11117963. The next prime is 11117987. The reversal of 11117980 is 8971111.

11117980 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 not an unprimeable number, because it can be changed into a prime (11117987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2809 + ... + 5488.

It is an arithmetic number, because the mean of its divisors is an integer number (987462).

Almost surely, 2^11117980 is an apocalyptic number.

11117980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11117980 is an abundant number, since it is smaller than the sum of its proper divisors (12581108).

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

11117980 is a wasteful number, since it uses less digits than its factorization.

11117980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8373 (or 8371 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 28.

The square root of 11117980 is about 3334.3635074779. The cubic root of 11117980 is about 223.1902898274.

The spelling of 11117980 in words is "eleven million, one hundred seventeen thousand, nine hundred eighty".