28086425 has 12 divisors (see below), whose sum is σ = 34917036. Its totient is φ = 22411200.

The previous prime is 28086391. The next prime is 28086433. The reversal of 28086425 is 52468082.

It can be written as a sum of positive squares in 6 ways, for example, as 38809 + 28047616 = 197^2 + 5296^2 .

It is a de Polignac number, because none of the positive numbers 2^k-28086425 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 (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10307 + ... + 12743.

It is an arithmetic number, because the mean of its divisors is an integer number (2909753).

Almost surely, 2^28086425 is an apocalyptic number.

28086425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28086425 is a deficient number, since it is larger than the sum of its proper divisors (6830611).

28086425 is a wasteful number, since it uses less digits than its factorization.

28086425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2908 (or 2903 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 28086425 is about 5299.6627251175. The cubic root of 28086425 is about 303.9710015333.

The spelling of 28086425 in words is "twenty-eight million, eighty-six thousand, four hundred twenty-five".