28248533329 has 9 divisors (see below), whose sum is σ = 28488021289. Its totient is φ = 28011046180.

The previous prime is 28248533311. The next prime is 28248533333. The reversal of 28248533329 is 92333584282.

The square root of 28248533329 is 168073.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 28248533329 - 2²⁷ = 28114315601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28248537329) 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 8 ways as a sum of consecutive naturals, for example, 22016922 + ... + 22018204.

Almost surely, 2^28248533329 is an apocalyptic number.

28248533329 is the 168073-rd square number.

28248533329 is the 84037-th centered octagonal number.

It is an amenable number.

28248533329 is a deficient number, since it is larger than the sum of its proper divisors (239487960).

28248533329 is an frugal number, since it uses more digits than its factorization.

28248533329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2828 (or 1414 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 49.

Multiplying 28248533329 by its sum of digits (49), we get a square (1384178133121 = 1176511²).

The spelling of 28248533329 in words is "twenty-eight billion, two hundred forty-eight million, five hundred thirty-three thousand, three hundred twenty-nine".