12212880 has 80 divisors (see below), whose sum is σ = 38223744. Its totient is φ = 3225600.

The previous prime is 12212867. The next prime is 12212881. The reversal of 12212880 is 8821221.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is a self number, because there is not a number n which added to its sum of digits gives 12212880.

It is not an unprimeable number, because it can be changed into a prime (12212881) 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 15 ways as a sum of consecutive naturals, for example, 36072 + ... + 36408.

Almost surely, 2^12212880 is an apocalyptic number.

12212880 is a gapful number since it is divisible by the number (10) 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 12212880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19111872).

12212880 is an abundant number, since it is smaller than the sum of its proper divisors (26010864).

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

12212880 is a wasteful number, since it uses less digits than its factorization.

12212880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504 (or 498 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 12212880 is about 3494.6931195743. The cubic root of 12212880 is about 230.2887363047.

The spelling of 12212880 in words is "twelve million, two hundred twelve thousand, eight hundred eighty".