11217408 has 80 divisors (see below), whose sum is σ = 30608160. Its totient is φ = 3649536.

The previous prime is 11217407. The next prime is 11217413. The reversal of 11217408 is 80471211.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11217407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102858 + ... + 102966.

It is an arithmetic number, because the mean of its divisors is an integer number (382602).

Almost surely, 2^11217408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11217408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15304080).

11217408 is an abundant number, since it is smaller than the sum of its proper divisors (19390752).

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

11217408 is an equidigital number, since it uses as much as digits as its factorization.

11217408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 11217408 is about 3349.2399137715. The cubic root of 11217408 is about 223.8536458945.

Adding to 11217408 its reverse (80471211), we get a palindrome (91688619).

The spelling of 11217408 in words is "eleven million, two hundred seventeen thousand, four hundred eight".