28660912429 has 4 divisors (see below), whose sum is σ = 28661514940. Its totient is φ = 28660309920.

The previous prime is 28660912333. The next prime is 28660912439. The reversal of 28660912429 is 92421906682.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24086419204 + 4574493225 = 155198^2 + 67635^2 .

It is a cyclic number.

It is not a de Polignac number, because 28660912429 - 2¹⁵ = 28660879661 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 (28660912439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223152 + ... + 327289.

It is an arithmetic number, because the mean of its divisors is an integer number (7165378735).

Almost surely, 2^28660912429 is an apocalyptic number.

It is an amenable number.

28660912429 is a deficient number, since it is larger than the sum of its proper divisors (602511).

28660912429 is an equidigital number, since it uses as much as digits as its factorization.

28660912429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602510.

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 28660912429 in words is "twenty-eight billion, six hundred sixty million, nine hundred twelve thousand, four hundred twenty-nine".