12040028 has 96 divisors (see below), whose sum is σ = 29503488. Its totient is φ = 4147200.

The previous prime is 12040027. The next prime is 12040057. The reversal of 12040028 is 82004021.

It is a junction number, because it is equal to n+sod(n) for n = 12039988 and 12040015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12040027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124076 + ... + 124172.

It is an arithmetic number, because the mean of its divisors is an integer number (307328).

Almost surely, 2^12040028 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 12040028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14751744).

12040028 is an abundant number, since it is smaller than the sum of its proper divisors (17463460).

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

12040028 is a wasteful number, since it uses less digits than its factorization.

12040028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 12040028 is about 3469.8743493101. The cubic root of 12040028 is about 229.1971250021.

Adding to 12040028 its reverse (82004021), we get a palindrome (94044049).

The spelling of 12040028 in words is "twelve million, forty thousand, twenty-eight".