28027111025 has 12 divisors (see below), whose sum is σ = 34781751132. Its totient is φ = 22403538240.

The previous prime is 28027110983. The next prime is 28027111037. The reversal of 28027111025 is 52011172082.

It can be written as a sum of positive squares in 6 ways, for example, as 644804449 + 27382306576 = 25393^2 + 165476^2 .

It is not a de Polignac number, because 28027111025 - 2³⁴ = 10847241841 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 422222 + ... + 484071.

It is an arithmetic number, because the mean of its divisors is an integer number (2898479261).

Almost surely, 2^28027111025 is an apocalyptic number.

28027111025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28027111025 is a deficient number, since it is larger than the sum of its proper divisors (6754640107).

28027111025 is a wasteful number, since it uses less digits than its factorization.

28027111025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907540 (or 907535 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 29.

The spelling of 28027111025 in words is "twenty-eight billion, twenty-seven million, one hundred eleven thousand, twenty-five".