28245715875 has 256 divisors, whose sum is σ = 61165977600. Its totient is φ = 12737088000.

The previous prime is 28245715847. The next prime is 28245715879. The reversal of 28245715875 is 57851754282.

It is a happy number.

28245715875 is a `hidden beast` number, since 2 + 8 + 2 + 4 + 57 + 1 + 587 + 5 = 666.

It is not a de Polignac number, because 28245715875 - 2¹⁹ = 28245191587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28245715879) by changing a digit.

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 255 ways as a sum of consecutive naturals, for example, 25841829 + ... + 25842921.

It is an arithmetic number, because the mean of its divisors is an integer number (238929600).

Almost surely, 2^28245715875 is an apocalyptic number.

28245715875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28245715875 is an abundant number, since it is smaller than the sum of its proper divisors (32920261725).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28245715875 is a wasteful number, since it uses less digits than its factorization.

28245715875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180 (or 1164 counting only the distinct ones).

The product of its digits is 6272000, while the sum is 54.

The spelling of 28245715875 in words is "twenty-eight billion, two hundred forty-five million, seven hundred fifteen thousand, eight hundred seventy-five".