12028427049 has 4 divisors (see below), whose sum is σ = 16037902736. Its totient is φ = 8018951364.

The previous prime is 12028427011. The next prime is 12028427057. The reversal of 12028427049 is 94072482021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12028427049 - 2¹¹ = 12028425001 is a prime.

It is a super-2 number, since 2×12028427049² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12028426998 and 12028427016.

It is not an unprimeable number, because it can be changed into a prime (12028427249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2004737839 + ... + 2004737844.

It is an arithmetic number, because the mean of its divisors is an integer number (4009475684).

Almost surely, 2^12028427049 is an apocalyptic number.

It is an amenable number.

12028427049 is a deficient number, since it is larger than the sum of its proper divisors (4009475687).

12028427049 is an equidigital number, since it uses as much as digits as its factorization.

12028427049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4009475686.

The product of its (nonzero) digits is 64512, while the sum is 39.

The spelling of 12028427049 in words is "twelve billion, twenty-eight million, four hundred twenty-seven thousand, forty-nine".