28030278025 has 12 divisors (see below), whose sum is σ = 34780031500. Its totient is φ = 22409714880.

The previous prime is 28030277987. The next prime is 28030278049. The reversal of 28030278025 is 52087203082.

It can be written as a sum of positive squares in 6 ways, for example, as 954562816 + 27075715209 = 30896^2 + 164547^2 .

It is not a de Polignac number, because 28030278025 - 2¹³ = 28030269833 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 323190 + ... + 400639.

Almost surely, 2^28030278025 is an apocalyptic number.

28030278025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28030278025 is a deficient number, since it is larger than the sum of its proper divisors (6749753475).

28030278025 is a wasteful number, since it uses less digits than its factorization.

28030278025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725388 (or 725383 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The spelling of 28030278025 in words is "twenty-eight billion, thirty million, two hundred seventy-eight thousand, twenty-five".