28208882025 has 27 divisors (see below), whose sum is σ = 50529754821. Its totient is φ = 15043393440.

The previous prime is 28208882011. The next prime is 28208882063. The reversal of 28208882025 is 52028880282.

The square root of 28208882025 is 167955.

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 4851261801 + 23357620224 = 69651^2 + 152832^2 .

It is not a de Polignac number, because 28208882025 - 2²⁹ = 27672011113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 2513727 + ... + 2524923.

Almost surely, 2^28208882025 is an apocalyptic number.

28208882025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28208882025 is the 167955-th square number.

28208882025 is the 83978-th centered octagonal number.

It is an amenable number.

28208882025 is a deficient number, since it is larger than the sum of its proper divisors (22320872796).

28208882025 is an frugal number, since it uses more digits than its factorization.

28208882025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22410 (or 11205 counting only the distinct ones).

The product of its (nonzero) digits is 327680, while the sum is 45.

The spelling of 28208882025 in words is "twenty-eight billion, two hundred eight million, eight hundred eighty-two thousand, twenty-five".