28599883225 has 27 divisors (see below), whose sum is σ = 35861441917. Its totient is φ = 22626234080.

The previous prime is 28599883219. The next prime is 28599883231. The reversal of 28599883225 is 52238899582.

The square root of 28599883225 is 169115.

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

It is an interprime number because it is at equal distance from previous prime (28599883219) and next prime (28599883231).

It can be written as a sum of positive squares in 4 ways, for example, as 8535727321 + 20064155904 = 92389^2 + 141648^2 .

It is not a de Polignac number, because 28599883225 - 2³ = 28599883217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 125990562 + ... + 125990788.

Almost surely, 2^28599883225 is an apocalyptic number.

28599883225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28599883225 is the 169115-th square number.

28599883225 is the 84558-th centered octagonal number.

It is an amenable number.

28599883225 is a deficient number, since it is larger than the sum of its proper divisors (7261558692).

28599883225 is an frugal number, since it uses more digits than its factorization.

28599883225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762 (or 381 counting only the distinct ones).

The product of its digits is 24883200, while the sum is 61.

The spelling of 28599883225 in words is "twenty-eight billion, five hundred ninety-nine million, eight hundred eighty-three thousand, two hundred twenty-five".