28789425829 has 4 divisors (see below), whose sum is σ = 30482921484. Its totient is φ = 27095930176.

The previous prime is 28789425787. The next prime is 28789425859. The reversal of 28789425829 is 92852498782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92852498782 = 2 ⋅46426249391.

It can be written as a sum of positive squares in 2 ways, for example, as 25252388100 + 3537037729 = 158910^2 + 59473^2 .

It is a cyclic number.

It is not a de Polignac number, because 28789425829 - 2⁷ = 28789425701 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 (28789425859) 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, 846747802 + ... + 846747835.

It is an arithmetic number, because the mean of its divisors is an integer number (7620730371).

Almost surely, 2^28789425829 is an apocalyptic number.

It is an amenable number.

28789425829 is a deficient number, since it is larger than the sum of its proper divisors (1693495655).

28789425829 is a wasteful number, since it uses less digits than its factorization.

28789425829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693495654.

The product of its digits is 46448640, while the sum is 64.

The spelling of 28789425829 in words is "twenty-eight billion, seven hundred eighty-nine million, four hundred twenty-five thousand, eight hundred twenty-nine".