11122780 has 24 divisors (see below), whose sum is σ = 23531760. Its totient is φ = 4416000.

The previous prime is 11122763. The next prime is 11122799. The reversal of 11122780 is 8722111.

11122780 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 an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 780 + ... + 4780.

It is an arithmetic number, because the mean of its divisors is an integer number (980490).

Almost surely, 2^11122780 is an apocalyptic number.

11122780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11122780 is an abundant number, since it is smaller than the sum of its proper divisors (12408980).

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

11122780 is a wasteful number, since it uses less digits than its factorization.

11122780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4149 (or 4147 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 11122780 is about 3335.0832073578. The cubic root of 11122780 is about 223.2224047515. Note that the first 3 decimals are identical.

Adding to 11122780 its reverse (8722111), we get a palindrome (19844891).

The spelling of 11122780 in words is "eleven million, one hundred twenty-two thousand, seven hundred eighty".