28028258025 has 48 divisors (see below), whose sum is σ = 49135396800. Its totient is φ = 14058178560.

The previous prime is 28028257981. The next prime is 28028258087. The reversal of 28028258025 is 52085282082.

It is not a de Polignac number, because 28028258025 - 2⁹ = 28028257513 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 123441 + ... + 267009.

It is an arithmetic number, because the mean of its divisors is an integer number (1023654100).

Almost surely, 2^28028258025 is an apocalyptic number.

28028258025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28028258025 is a deficient number, since it is larger than the sum of its proper divisors (21107138775).

28028258025 is a wasteful number, since it uses less digits than its factorization.

28028258025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143738 (or 143733 counting only the distinct ones).

The product of its (nonzero) digits is 204800, while the sum is 42.

The spelling of 28028258025 in words is "twenty-eight billion, twenty-eight million, two hundred fifty-eight thousand, twenty-five".