11227780 has 12 divisors (see below), whose sum is σ = 23578380. Its totient is φ = 4491104.

The previous prime is 11227771. The next prime is 11227781. The reversal of 11227780 is 8772211.

It can be written as a sum of positive squares in 2 ways, for example, as 2359296 + 8868484 = 1536^2 + 2978^2 .

It is a super-3 number, since 3×11227780³ (a number of 22 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (11227781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280675 + ... + 280714.

It is an arithmetic number, because the mean of its divisors is an integer number (1964865).

Almost surely, 2^11227780 is an apocalyptic number.

11227780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11227780 is an abundant number, since it is smaller than the sum of its proper divisors (12350600).

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

11227780 is a wasteful number, since it uses less digits than its factorization.

11227780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561398 (or 561396 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 11227780 is about 3350.7879670310. The cubic root of 11227780 is about 223.9226188924.

Adding to 11227780 its reverse (8772211), we get a palindrome (19999991).

The spelling of 11227780 in words is "eleven million, two hundred twenty-seven thousand, seven hundred eighty".