28055925 has 18 divisors (see below), whose sum is σ = 50251682. Its totient is φ = 14963040.

The previous prime is 28055903. The next prime is 28055939. The reversal of 28055925 is 52955082.

28055925 is a `hidden beast` number, since 2 + 80 + 559 + 25 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 272484 + 27783441 = 522^2 + 5271^2 .

It is not a de Polignac number, because 28055925 - 2⁹ = 28055413 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 28055925.

It is a congruent 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 17 ways as a sum of consecutive naturals, for example, 62122 + ... + 62571.

Almost surely, 2^28055925 is an apocalyptic number.

28055925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28055925 is a deficient number, since it is larger than the sum of its proper divisors (22195757).

28055925 is a wasteful number, since it uses less digits than its factorization.

28055925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124709 (or 124701 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 28055925 is about 5296.7844018801. The cubic root of 28055925 is about 303.8609308792.

The spelling of 28055925 in words is "twenty-eight million, fifty-five thousand, nine hundred twenty-five".