28488376225 has 9 divisors (see below), whose sum is σ = 35326633017. Its totient is φ = 22790025840.

The previous prime is 28488376223. The next prime is 28488376271. The reversal of 28488376225 is 52267388482.

The square root of 28488376225 is 168785.

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

It can be written as a sum of positive squares in 4 ways, for example, as 3038049 + 28485338176 = 1743^2 + 168776^2 .

It is not a de Polignac number, because 28488376225 - 2¹ = 28488376223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28488376223) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 827047 + ... + 860803.

Almost surely, 2^28488376225 is an apocalyptic number.

28488376225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28488376225 is the 168785-th square number.

28488376225 is the 84393-rd centered octagonal number.

It is an amenable number.

28488376225 is a deficient number, since it is larger than the sum of its proper divisors (6838256792).

28488376225 is an frugal number, since it uses more digits than its factorization.

28488376225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67524 (or 33762 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 55.

The spelling of 28488376225 in words is "twenty-eight billion, four hundred eighty-eight million, three hundred seventy-six thousand, two hundred twenty-five".