28245884205001 has 4 divisors (see below), whose sum is σ = 29219880212100. Its totient is φ = 27271888197904.

The previous prime is 28245884204983. The next prime is 28245884205043. The reversal of 28245884205001 is 10050248854282.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11389308788025 + 16856575416976 = 3374805^2 + 4105676^2 .

It is a cyclic number.

It is not a de Polignac number, because 28245884205001 - 2¹¹ = 28245884202953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28245884205061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 486998003506 + ... + 486998003563.

It is an arithmetic number, because the mean of its divisors is an integer number (7304970053025).

Almost surely, 2^{28245884205001} is an apocalyptic number.

It is an amenable number.

28245884205001 is a deficient number, since it is larger than the sum of its proper divisors (973996007099).

28245884205001 is an equidigital number, since it uses as much as digits as its factorization.

28245884205001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973996007098.

The product of its (nonzero) digits is 1638400, while the sum is 49.

The spelling of 28245884205001 in words is "twenty-eight trillion, two hundred forty-five billion, eight hundred eighty-four million, two hundred five thousand, one".