28626428671 has 4 divisors (see below), whose sum is σ = 28627511832. Its totient is φ = 28625345512.

The previous prime is 28626428669. The next prime is 28626428681. The reversal of 28626428671 is 17682462682.

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 28626428671 - 2¹ = 28626428669 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 (28626428681) 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, 500920 + ... + 555133.

It is an arithmetic number, because the mean of its divisors is an integer number (7156877958).

Almost surely, 2^28626428671 is an apocalyptic number.

28626428671 is a deficient number, since it is larger than the sum of its proper divisors (1083161).

28626428671 is a wasteful number, since it uses less digits than its factorization.

28626428671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083160.

The product of its digits is 3096576, while the sum is 52.

The spelling of 28626428671 in words is "twenty-eight billion, six hundred twenty-six million, four hundred twenty-eight thousand, six hundred seventy-one".