11003880 has 64 divisors (see below), whose sum is σ = 33359040. Its totient is φ = 2903552.

The previous prime is 11003857. The next prime is 11003893. The reversal of 11003880 is 8830011.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12412 + ... + 13268.

It is an arithmetic number, because the mean of its divisors is an integer number (521235).

Almost surely, 2^11003880 is an apocalyptic number.

11003880 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 11003880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16679520).

11003880 is an abundant number, since it is smaller than the sum of its proper divisors (22355160).

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

11003880 is a wasteful number, since it uses less digits than its factorization.

11003880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978 (or 974 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 11003880 is about 3317.2096707926. The cubic root of 11003880 is about 222.4241545975.

Adding to 11003880 its reverse (8830011), we get a palindrome (19833891).

The spelling of 11003880 in words is "eleven million, three thousand, eight hundred eighty".