12015980 has 48 divisors (see below), whose sum is σ = 26906880. Its totient is φ = 4494528.

The previous prime is 12015977. The next prime is 12016013. The reversal of 12015980 is 8951021.

It is a happy 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, 38987 + ... + 39293.

It is an arithmetic number, because the mean of its divisors is an integer number (560560).

Almost surely, 2^12015980 is an apocalyptic number.

12015980 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 12015980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13453440).

12015980 is an abundant number, since it is smaller than the sum of its proper divisors (14890900).

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

12015980 is a wasteful number, since it uses less digits than its factorization.

12015980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 12015980 is about 3466.4073620970. The cubic root of 12015980 is about 229.0444286204.

The spelling of 12015980 in words is "twelve million, fifteen thousand, nine hundred eighty".