28936625 has 8 divisors (see below), whose sum is σ = 36113064. Its totient is φ = 23149200.

The previous prime is 28936619. The next prime is 28936643. The reversal of 28936625 is 52663982.

28936625 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in 4 ways, for example, as 1132096 + 27804529 = 1064^2 + 5273^2 .

It is not a de Polignac number, because 28936625 - 2¹⁰ = 28935601 is a prime.

It is a Duffinian number.

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 115622 + ... + 115871.

It is an arithmetic number, because the mean of its divisors is an integer number (4514133).

Almost surely, 2^28936625 is an apocalyptic number.

28936625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28936625 is a deficient number, since it is larger than the sum of its proper divisors (7176439).

28936625 is an equidigital number, since it uses as much as digits as its factorization.

28936625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231508 (or 231498 counting only the distinct ones).

The product of its digits is 155520, while the sum is 41.

The square root of 28936625 is about 5379.2773678255. The cubic root of 28936625 is about 307.0077169524.

The spelling of 28936625 in words is "twenty-eight million, nine hundred thirty-six thousand, six hundred twenty-five".