28056862825 has 6 divisors (see below), whose sum is σ = 34790509934. Its totient is φ = 22445490240.

The previous prime is 28056862817. The next prime is 28056862871. The reversal of 28056862825 is 52826865082.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1038708441 + 27018154384 = 32229^2 + 164372^2 .

It is not a de Polignac number, because 28056862825 - 2³ = 28056862817 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 561137232 + ... + 561137281.

Almost surely, 2^28056862825 is an apocalyptic number.

28056862825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28056862825 is a deficient number, since it is larger than the sum of its proper divisors (6733647109).

28056862825 is a wasteful number, since it uses less digits than its factorization.

28056862825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122274523 (or 1122274518 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 52.

The spelling of 28056862825 in words is "twenty-eight billion, fifty-six million, eight hundred sixty-two thousand, eight hundred twenty-five".