12028631 has 4 divisors (see below), whose sum is σ = 12079200. Its totient is φ = 11978064.

The previous prime is 12028603. The next prime is 12028637. The reversal of 12028631 is 13682021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12028631 - 2¹⁸ = 11766487 is a prime.

It is a super-2 number, since 2×12028631² = 289375927468322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12028597 and 12028606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12028637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24926 + ... + 25403.

It is an arithmetic number, because the mean of its divisors is an integer number (3019800).

Almost surely, 2^12028631 is an apocalyptic number.

12028631 is a deficient number, since it is larger than the sum of its proper divisors (50569).

12028631 is an equidigital number, since it uses as much as digits as its factorization.

12028631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50568.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 12028631 is about 3468.2316819959. The cubic root of 12028631 is about 229.1247834128.

The spelling of 12028631 in words is "twelve million, twenty-eight thousand, six hundred thirty-one".