12005478 has 48 divisors (see below), whose sum is σ = 27284400. Its totient is φ = 3810240.

The previous prime is 12005423. The next prime is 12005479. The reversal of 12005478 is 87450021.

12005478 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12005479) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56793 + ... + 57003.

It is an arithmetic number, because the mean of its divisors is an integer number (568425).

Almost surely, 2^12005478 is an apocalyptic number.

12005478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12005478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13642200).

12005478 is an abundant number, since it is smaller than the sum of its proper divisors (15278922).

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

12005478 is a wasteful number, since it uses less digits than its factorization.

12005478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 12005478 is about 3464.8922061155. The cubic root of 12005478 is about 228.9776806810.

Adding to 12005478 its reverse (87450021), we get a palindrome (99455499).

The spelling of 12005478 in words is "twelve million, five thousand, four hundred seventy-eight".