28928332113 has 4 divisors (see below), whose sum is σ = 38571109488. Its totient is φ = 19285554740.

The previous prime is 28928332109. The next prime is 28928332127. The reversal of 28928332113 is 31123382982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28928332113 - 2² = 28928332109 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28928332193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4821388683 + ... + 4821388688.

It is an arithmetic number, because the mean of its divisors is an integer number (9642777372).

Almost surely, 2^28928332113 is an apocalyptic number.

It is an amenable number.

28928332113 is a deficient number, since it is larger than the sum of its proper divisors (9642777375).

28928332113 is an equidigital number, since it uses as much as digits as its factorization.

28928332113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9642777374.

The product of its digits is 124416, while the sum is 42.

The spelling of 28928332113 in words is "twenty-eight billion, nine hundred twenty-eight million, three hundred thirty-two thousand, one hundred thirteen".