12169728 has 120 divisors (see below), whose sum is σ = 37237200. Its totient is φ = 3815424.

The previous prime is 12169727. The next prime is 12169819. The reversal of 12169728 is 82796121.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 12169692 and 12169701.

It is not an unprimeable number, because it can be changed into a prime (12169727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87483 + ... + 87621.

It is an arithmetic number, because the mean of its divisors is an integer number (310310).

Almost surely, 2^12169728 is an apocalyptic number.

12169728 is a gapful number since it is divisible by the number (18) 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 12169728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18618600).

12169728 is an abundant number, since it is smaller than the sum of its proper divisors (25067472).

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

12169728 is a wasteful number, since it uses less digits than its factorization.

12169728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 163 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 12169728 is about 3488.5137236365. The cubic root of 12169728 is about 230.0171883815.

It can be divided in two parts, 1 and 2169728, that added together give a square (2169729 = 1473²).

The spelling of 12169728 in words is "twelve million, one hundred sixty-nine thousand, seven hundred twenty-eight".