28336725 has 18 divisors (see below), whose sum is σ = 50754626. Its totient is φ = 15112800.

The previous prime is 28336691. The next prime is 28336751. The reversal of 28336725 is 52763382.

It can be written as a sum of positive squares in 3 ways, for example, as 8328996 + 20007729 = 2886^2 + 4473^2 .

It is not a de Polignac number, because 28336725 - 2⁹ = 28336213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28336725.

It is a congruent 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 17 ways as a sum of consecutive naturals, for example, 62746 + ... + 63195.

Almost surely, 2^28336725 is an apocalyptic number.

28336725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28336725 is a deficient number, since it is larger than the sum of its proper divisors (22417901).

28336725 is a wasteful number, since it uses less digits than its factorization.

28336725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125957 (or 125949 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 28336725 is about 5323.2250562981. The cubic root of 28336725 is about 304.8713064512.

The spelling of 28336725 in words is "twenty-eight million, three hundred thirty-six thousand, seven hundred twenty-five".