12028140 has 72 divisors (see below), whose sum is σ = 38416560. Its totient is φ = 3037824.

The previous prime is 12028139. The next prime is 12028147. The reversal of 12028140 is 4182021.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12028147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1662 + ... + 5178.

Almost surely, 2^12028140 is an apocalyptic number.

12028140 is a gapful number since it is divisible by the number (10) 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 12028140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19208280).

12028140 is an abundant number, since it is smaller than the sum of its proper divisors (26388420).

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

12028140 is a wasteful number, since it uses less digits than its factorization.

12028140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3551 (or 3546 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 12028140 is about 3468.1608959216. The cubic root of 12028140 is about 229.1216658012.

The spelling of 12028140 in words is "twelve million, twenty-eight thousand, one hundred forty".