28989433208 has 8 divisors (see below), whose sum is σ = 54355187280. Its totient is φ = 14494716600.

The previous prime is 28989433201. The next prime is 28989433219. The reversal of 28989433208 is 80233498982.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28989433201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1811839568 + ... + 1811839583.

It is an arithmetic number, because the mean of its divisors is an integer number (6794398410).

Almost surely, 2^28989433208 is an apocalyptic number.

It is an amenable number.

28989433208 is a deficient number, since it is larger than the sum of its proper divisors (25365754072).

28989433208 is a wasteful number, since it uses less digits than its factorization.

28989433208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3623679157 (or 3623679153 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 56.

The spelling of 28989433208 in words is "twenty-eight billion, nine hundred eighty-nine million, four hundred thirty-three thousand, two hundred eight".