12099580 has 48 divisors (see below), whose sum is σ = 28334880. Its totient is φ = 4313088.

The previous prime is 12099569. The next prime is 12099589. The reversal of 12099580 is 8599021.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12099589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5524 + ... + 7396.

It is an arithmetic number, because the mean of its divisors is an integer number (590310).

Almost surely, 2^12099580 is an apocalyptic number.

12099580 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 12099580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14167440).

12099580 is an abundant number, since it is smaller than the sum of its proper divisors (16235300).

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

12099580 is a wasteful number, since it uses less digits than its factorization.

12099580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918 (or 1916 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 12099580 is about 3478.4450549060. The cubic root of 12099580 is about 229.5743861725.

The spelling of 12099580 in words is "twelve million, ninety-nine thousand, five hundred eighty".