28445503025 has 12 divisors (see below), whose sum is σ = 35755609932. Its totient is φ = 22444669440.

The previous prime is 28445503007. The next prime is 28445503027. The reversal of 28445503025 is 52030554482.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 5452936336 + 22992566689 = 73844^2 + 151633^2 .

It is not a de Polignac number, because 28445503025 - 2¹⁸ = 28445240881 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28445503025.

It is not an unprimeable number, because it can be changed into a prime (28445503027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7791464 + ... + 7795113.

It is an arithmetic number, because the mean of its divisors is an integer number (2979634161).

Almost surely, 2^28445503025 is an apocalyptic number.

28445503025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28445503025 is a deficient number, since it is larger than the sum of its proper divisors (7310106907).

28445503025 is a wasteful number, since it uses less digits than its factorization.

28445503025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15586660 (or 15586655 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 38.

The spelling of 28445503025 in words is "twenty-eight billion, four hundred forty-five million, five hundred three thousand, twenty-five".