12028640 has 48 divisors (see below), whose sum is σ = 30608928. Its totient is φ = 4440576.

The previous prime is 12028637. The next prime is 12028657. The reversal of 12028640 is 4682021.

12028640 = T₃₀₅ + T₃₀₆ + ... + T₄₆₄.

12028640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 812 + ... + 4971.

It is an arithmetic number, because the mean of its divisors is an integer number (637686).

Almost surely, 2^12028640 is an apocalyptic number.

12028640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12028640 is an abundant number, since it is smaller than the sum of its proper divisors (18580288).

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

12028640 is a wasteful number, since it uses less digits than its factorization.

12028640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5811 (or 5803 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 12028640 is about 3468.2329794868. The cubic root of 12028640 is about 229.1248405576.

The spelling of 12028640 in words is "twelve million, twenty-eight thousand, six hundred forty".