12385428 has 48 divisors (see below), whose sum is σ = 31872960. Its totient is φ = 3712000.

The previous prime is 12385391. The next prime is 12385433. The reversal of 12385428 is 82458321.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent 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, 12868 + ... + 13796.

It is an arithmetic number, because the mean of its divisors is an integer number (664020).

Almost surely, 2^12385428 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 12385428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15936480).

12385428 is an abundant number, since it is smaller than the sum of its proper divisors (19487532).

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

12385428 is a wasteful number, since it uses less digits than its factorization.

12385428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048 (or 1046 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 12385428 is about 3519.2936791351. The cubic root of 12385428 is about 231.3682027312.

It can be divided in two parts, 1238 and 5428, that added together give a palindrome (6666).

The spelling of 12385428 in words is "twelve million, three hundred eighty-five thousand, four hundred twenty-eight".