28258765075 has 48 divisors (see below), whose sum is σ = 38552220000. Its totient is φ = 20464496640.

The previous prime is 28258765061. The next prime is 28258765081. The reversal of 28258765075 is 57056785282.

It is not a de Polignac number, because 28258765075 - 2²⁹ = 27721894163 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1325601 + ... + 1346749.

It is an arithmetic number, because the mean of its divisors is an integer number (803171250).

Almost surely, 2^28258765075 is an apocalyptic number.

28258765075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28258765075 is a deficient number, since it is larger than the sum of its proper divisors (10293454925).

28258765075 is a wasteful number, since it uses less digits than its factorization.

28258765075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21304 (or 21299 counting only the distinct ones).

The product of its (nonzero) digits is 9408000, while the sum is 55.

The spelling of 28258765075 in words is "twenty-eight billion, two hundred fifty-eight million, seven hundred sixty-five thousand, seventy-five".