28928671505 has 8 divisors (see below), whose sum is σ = 34987748352. Its totient is φ = 22960708848.

The previous prime is 28928671501. The next prime is 28928671573. The reversal of 28928671505 is 50517682982.

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 28928671505 - 2² = 28928671501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28928671501) 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, 22777847 + ... + 22779116.

It is an arithmetic number, because the mean of its divisors is an integer number (4373468544).

Almost surely, 2^28928671505 is an apocalyptic number.

It is an amenable number.

28928671505 is a deficient number, since it is larger than the sum of its proper divisors (6059076847).

28928671505 is a wasteful number, since it uses less digits than its factorization.

28928671505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45557095.

The product of its (nonzero) digits is 2419200, while the sum is 53.

The spelling of 28928671505 in words is "twenty-eight billion, nine hundred twenty-eight million, six hundred seventy-one thousand, five hundred five".