28696504129 has 4 divisors (see below), whose sum is σ = 28805616576. Its totient is φ = 28587391684.

The previous prime is 28696504043. The next prime is 28696504147. The reversal of 28696504129 is 92140569682.

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 a cyclic number.

It is not a de Polignac number, because 28696504129 - 2¹³ = 28696495937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28696508129) 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, 54555829 + ... + 54556354.

It is an arithmetic number, because the mean of its divisors is an integer number (7201404144).

Almost surely, 2^28696504129 is an apocalyptic number.

It is an amenable number.

28696504129 is a deficient number, since it is larger than the sum of its proper divisors (109112447).

28696504129 is a wasteful number, since it uses less digits than its factorization.

28696504129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109112446.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 28696504129 in words is "twenty-eight billion, six hundred ninety-six million, five hundred four thousand, one hundred twenty-nine".