28555250 has 16 divisors (see below), whose sum is σ = 53455896. Its totient is φ = 11422000.

The previous prime is 28555243. The next prime is 28555253. The reversal of 28555250 is 5255582.

It can be written as a sum of positive squares in 4 ways, for example, as 8743849 + 19811401 = 2957^2 + 4451^2 .

It is not an unprimeable number, because it can be changed into a prime (28555253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56861 + ... + 57360.

Almost surely, 2^28555250 is an apocalyptic number.

28555250 is a deficient number, since it is larger than the sum of its proper divisors (24900646).

28555250 is a wasteful number, since it uses less digits than its factorization.

28555250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114238 (or 114228 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 32.

The square root of 28555250 is about 5343.7112571695. The cubic root of 28555250 is about 305.6529949418.

The spelling of 28555250 in words is "twenty-eight million, five hundred fifty-five thousand, two hundred fifty".