11100980 has 24 divisors (see below), whose sum is σ = 25431840. Its totient is φ = 4036640.

The previous prime is 11100979. The next prime is 11100989. The reversal of 11100980 is 8900111.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25010 + ... + 25449.

It is an arithmetic number, because the mean of its divisors is an integer number (1059660).

Almost surely, 2^11100980 is an apocalyptic number.

11100980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11100980 is an abundant number, since it is smaller than the sum of its proper divisors (14330860).

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

11100980 is a wasteful number, since it uses less digits than its factorization.

11100980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50479 (or 50477 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 11100980 is about 3331.8133201006. The cubic root of 11100980 is about 223.0764750746.

The spelling of 11100980 in words is "eleven million, one hundred thousand, nine hundred eighty".