12028709 has 8 divisors (see below), whose sum is σ = 14996928. Its totient is φ = 9372960.

The previous prime is 12028699. The next prime is 12028739. The reversal of 12028709 is 90782021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12028709 - 2⁴ = 12028693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12028739) 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 7 ways as a sum of consecutive naturals, for example, 78032 + ... + 78185.

It is an arithmetic number, because the mean of its divisors is an integer number (1874616).

Almost surely, 2^12028709 is an apocalyptic number.

It is an amenable number.

12028709 is a deficient number, since it is larger than the sum of its proper divisors (2968219).

12028709 is a wasteful number, since it uses less digits than its factorization.

12028709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156235.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 12028709 is about 3468.2429269012. The cubic root of 12028709 is about 229.1252786671.

The spelling of 12028709 in words is "twelve million, twenty-eight thousand, seven hundred nine".