28969728223 has 8 divisors (see below), whose sum is σ = 30242635488. Its totient is φ = 27697933824.

The previous prime is 28969728173. The next prime is 28969728313. The reversal of 28969728223 is 32282796982.

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

It is a cyclic number.

It is not a de Polignac number, because 28969728223 - 2²¹ = 28967631071 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 (28969728323) 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, 224790 + ... + 329347.

It is an arithmetic number, because the mean of its divisors is an integer number (3780329436).

Almost surely, 2^28969728223 is an apocalyptic number.

28969728223 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28969728223 is a deficient number, since it is larger than the sum of its proper divisors (1272907265).

28969728223 is a wasteful number, since it uses less digits than its factorization.

28969728223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556433.

The product of its digits is 10450944, while the sum is 58.

The spelling of 28969728223 in words is "twenty-eight billion, nine hundred sixty-nine million, seven hundred twenty-eight thousand, two hundred twenty-three".