28507828105 has 8 divisors (see below), whose sum is σ = 36221711112. Its totient is φ = 21464717568.

The previous prime is 28507828091. The next prime is 28507828123. The reversal of 28507828105 is 50182870582.

It can be written as a sum of positive squares in 4 ways, for example, as 1221083136 + 27286744969 = 34944^2 + 165187^2 .

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 28507828105 - 2⁵ = 28507828073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167693022 + ... + 167693191.

It is an arithmetic number, because the mean of its divisors is an integer number (4527713889).

Almost surely, 2^28507828105 is an apocalyptic number.

It is an amenable number.

28507828105 is a deficient number, since it is larger than the sum of its proper divisors (7713883007).

28507828105 is a wasteful number, since it uses less digits than its factorization.

28507828105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335386235.

The product of its (nonzero) digits is 358400, while the sum is 46.

The spelling of 28507828105 in words is "twenty-eight billion, five hundred seven million, eight hundred twenty-eight thousand, one hundred five".