12418728 has 64 divisors (see below), whose sum is σ = 36720000. Its totient is φ = 3424512.

The previous prime is 12418691. The next prime is 12418729. The reversal of 12418728 is 82781421.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (12418729) 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, 3598 + ... + 6146.

It is an arithmetic number, because the mean of its divisors is an integer number (573750).

Almost surely, 2^12418728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12418728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18360000).

12418728 is an abundant number, since it is smaller than the sum of its proper divisors (24301272).

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

12418728 is a wasteful number, since it uses less digits than its factorization.

12418728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594 (or 2590 counting only the distinct ones).

The product of its digits is 7168, while the sum is 33.

The square root of 12418728 is about 3524.0215663358. The cubic root of 12418728 is about 231.5753727083.

The spelling of 12418728 in words is "twelve million, four hundred eighteen thousand, seven hundred twenty-eight".