12215448 has 80 divisors (see below), whose sum is σ = 39116880. Its totient is φ = 3488832.

The previous prime is 12215429. The next prime is 12215449. The reversal of 12215448 is 84451221.

12215448 is a `hidden beast` number, since 1 + 2 + 215 + 448 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12215449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3190 + ... + 5882.

It is an arithmetic number, because the mean of its divisors is an integer number (488961).

Almost surely, 2^12215448 is an apocalyptic number.

12215448 is a gapful number since it is divisible by the number (18) 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 12215448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19558440).

12215448 is an abundant number, since it is smaller than the sum of its proper divisors (26901432).

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

12215448 is a wasteful number, since it uses less digits than its factorization.

12215448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2718 (or 2705 counting only the distinct ones).

The product of its digits is 2560, while the sum is 27.

The square root of 12215448 is about 3495.0605144976. The cubic root of 12215448 is about 230.3048760967.

Adding to 12215448 its reverse (84451221), we get a palindrome (96666669).

The spelling of 12215448 in words is "twelve million, two hundred fifteen thousand, four hundred forty-eight".