28107528025 has 6 divisors (see below), whose sum is σ = 34853334782. Its totient is φ = 22486022400.

The previous prime is 28107528011. The next prime is 28107528047. The reversal of 28107528025 is 52082570182.

It can be written as a sum of positive squares in 3 ways, for example, as 3685339849 + 24422188176 = 60707^2 + 156276^2 .

It is not a de Polignac number, because 28107528025 - 2⁷ = 28107527897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 562150536 + ... + 562150585.

Almost surely, 2^28107528025 is an apocalyptic number.

28107528025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28107528025 is a deficient number, since it is larger than the sum of its proper divisors (6745806757).

28107528025 is a wasteful number, since it uses less digits than its factorization.

28107528025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124301131 (or 1124301126 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 40.

The spelling of 28107528025 in words is "twenty-eight billion, one hundred seven million, five hundred twenty-eight thousand, twenty-five".