28989417309 has 8 divisors (see below), whose sum is σ = 38666628000. Its totient is φ = 19319242416.

The previous prime is 28989417293. The next prime is 28989417337. The reversal of 28989417309 is 90371498982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28989417309 - 2⁴ = 28989417293 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28989417389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1749327 + ... + 1765820.

It is an arithmetic number, because the mean of its divisors is an integer number (4833328500).

Almost surely, 2^28989417309 is an apocalyptic number.

It is an amenable number.

28989417309 is a deficient number, since it is larger than the sum of its proper divisors (9677210691).

28989417309 is a wasteful number, since it uses less digits than its factorization.

28989417309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3517899.

The product of its (nonzero) digits is 7838208, while the sum is 60.

The spelling of 28989417309 in words is "twenty-eight billion, nine hundred eighty-nine million, four hundred seventeen thousand, three hundred nine".