28429887789 has 12 divisors (see below), whose sum is σ = 42586334336. Its totient is φ = 18953258364.

The previous prime is 28429887779. The next prime is 28429887799. The reversal of 28429887789 is 98778892482.

It is an interprime number because it is at equal distance from previous prime (28429887779) and next prime (28429887799).

It is not a de Polignac number, because 28429887789 - 2⁵ = 28429887757 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 (28429887779) 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 11 ways as a sum of consecutive naturals, for example, 58497469 + ... + 58497954.

Almost surely, 2^28429887789 is an apocalyptic number.

It is an amenable number.

28429887789 is a deficient number, since it is larger than the sum of its proper divisors (14156446547).

28429887789 is an equidigital number, since it uses as much as digits as its factorization.

28429887789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116995438 (or 116995426 counting only the distinct ones).

The product of its digits is 260112384, while the sum is 72.

The spelling of 28429887789 in words is "twenty-eight billion, four hundred twenty-nine million, eight hundred eighty-seven thousand, seven hundred eighty-nine".