12113280 has 128 divisors (see below), whose sum is σ = 42962400. Its totient is φ = 3225600.

The previous prime is 12113273. The next prime is 12113291. The reversal of 12113280 is 8231121.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16930 + ... + 17630.

Almost surely, 2^12113280 is an apocalyptic number.

12113280 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 12113280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21481200).

12113280 is an abundant number, since it is smaller than the sum of its proper divisors (30849120).

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

12113280 is an equidigital number, since it uses as much as digits as its factorization.

12113280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729 (or 711 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 12113280 is about 3480.4137685051. The cubic root of 12113280 is about 229.6610002747.

The spelling of 12113280 in words is "twelve million, one hundred thirteen thousand, two hundred eighty".