11217380 has 12 divisors (see below), whose sum is σ = 23556540. Its totient is φ = 4486944.

The previous prime is 11217379. The next prime is 11217383. The reversal of 11217380 is 8371211.

It is a happy number.

11217380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1582564 + 9634816 = 1258^2 + 3104^2 .

It is a super-2 number, since 2×11217380² = 251659228128800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11217383) 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, 280415 + ... + 280454.

It is an arithmetic number, because the mean of its divisors is an integer number (1963045).

Almost surely, 2^11217380 is an apocalyptic number.

11217380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11217380 is an abundant number, since it is smaller than the sum of its proper divisors (12339160).

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

11217380 is a wasteful number, since it uses less digits than its factorization.

11217380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560878 (or 560876 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 11217380 is about 3349.2357337160. The cubic root of 11217380 is about 223.8534596392.

Adding to 11217380 its reverse (8371211), we get a palindrome (19588591).

The spelling of 11217380 in words is "eleven million, two hundred seventeen thousand, three hundred eighty".