12320880 has 160 divisors (see below), whose sum is σ = 44997120. Its totient is φ = 2749440.

The previous prime is 12320863. The next prime is 12320881. The reversal of 12320880 is 8802321.

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 12320880.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12320881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34141 + ... + 34499.

It is an arithmetic number, because the mean of its divisors is an integer number (281232).

Almost surely, 2^12320880 is an apocalyptic number.

12320880 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 12320880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22498560).

12320880 is an abundant number, since it is smaller than the sum of its proper divisors (32676240).

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

12320880 is a wasteful number, since it uses less digits than its factorization.

12320880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 12320880 is about 3510.1111093525. Note that the first 4 decimals coincide. The cubic root of 12320880 is about 230.9655689767.

The spelling of 12320880 in words is "twelve million, three hundred twenty thousand, eight hundred eighty".