1111880 has 96 divisors (see below), whose sum is σ = 3291840. Its totient is φ = 328320.

The previous prime is 1111867. The next prime is 1111897. The reversal of 1111880 is 881111.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58511 + ... + 58529.

It is an arithmetic number, because the mean of its divisors is an integer number (34290).

2^1111880 is an apocalyptic number.

1111880 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 1111880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1645920).

1111880 is an abundant number, since it is smaller than the sum of its proper divisors (2179960).

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

1111880 is a wasteful number, since it uses less digits than its factorization.

1111880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

The square root of 1111880 is about 1054.4572063389. The cubic root of 1111880 is about 103.5983025218.

Adding to 1111880 its reverse (881111), we get a palindrome (1992991).

It can be divided in two parts, 1111 and 880, that added together give a palindrome (1991).

The spelling of 1111880 in words is "one million, one hundred eleven thousand, eight hundred eighty".