12280000 has 70 divisors (see below), whose sum is σ = 30549596. Its totient is φ = 4896000.

The previous prime is 12279991. The next prime is 12280003. The reversal of 12280000 is 8221.

It is not an unprimeable number, because it can be changed into a prime (12280003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 39847 + ... + 40153.

Almost surely, 2^12280000 is an apocalyptic number.

12280000 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 12280000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15274798).

12280000 is an abundant number, since it is smaller than the sum of its proper divisors (18269596).

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

12280000 is an frugal number, since it uses more digits than its factorization.

12280000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 12280000 is about 3504.2830935870. The cubic root of 12280000 is about 230.7098422675.

Adding to 12280000 its reverse (8221), we get a palindrome (12288221).

The spelling of 12280000 in words is "twelve million, two hundred eighty thousand".