1111089980 has 384 divisors, whose sum is σ = 3468165120. Its totient is φ = 287400960.

The previous prime is 1111089971. The next prime is 1111090027. The reversal of 1111089980 is 899801111.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 8748677 + ... + 8748803.

It is an arithmetic number, because the mean of its divisors is an integer number (9031680).

Almost surely, 2^1111089980 is an apocalyptic number.

1111089980 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 1111089980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1734082560).

1111089980 is an abundant number, since it is smaller than the sum of its proper divisors (2357075140).

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

1111089980 is a wasteful number, since it uses less digits than its factorization.

1111089980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 38.

The square root of 1111089980 is about 33333.0163651596. The cubic root of 1111089980 is about 1035.7376026821.

The spelling of 1111089980 in words is "one billion, one hundred eleven million, eighty-nine thousand, nine hundred eighty".