28574189249 has 4 divisors (see below), whose sum is σ = 28578490836. Its totient is φ = 28569887664.

The previous prime is 28574189227. The next prime is 28574189297. The reversal of 28574189249 is 94298147582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94298147582 = 2 ⋅47149073791.

It can be written as a sum of positive squares in 2 ways, for example, as 5521233025 + 23052956224 = 74305^2 + 151832^2 .

It is a cyclic number.

It is not a de Polignac number, because 28574189249 - 2²⁴ = 28557412033 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28574189299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2140814 + ... + 2154119.

It is an arithmetic number, because the mean of its divisors is an integer number (7144622709).

Almost surely, 2^28574189249 is an apocalyptic number.

It is an amenable number.

28574189249 is a deficient number, since it is larger than the sum of its proper divisors (4301587).

28574189249 is an equidigital number, since it uses as much as digits as its factorization.

28574189249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4301586.

The product of its digits is 11612160, while the sum is 59.

The spelling of 28574189249 in words is "twenty-eight billion, five hundred seventy-four million, one hundred eighty-nine thousand, two hundred forty-nine".