28550787 has 8 divisors (see below), whose sum is σ = 40071360. Its totient is φ = 18032040.

The previous prime is 28550779. The next prime is 28550789. The reversal of 28550787 is 78705582.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28550787 - 2³ = 28550779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28550789) by changing a digit.

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, 250389 + ... + 250502.

It is an arithmetic number, because the mean of its divisors is an integer number (5008920).

Almost surely, 2^28550787 is an apocalyptic number.

28550787 is a deficient number, since it is larger than the sum of its proper divisors (11520573).

28550787 is a wasteful number, since it uses less digits than its factorization.

28550787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500913.

The product of its (nonzero) digits is 156800, while the sum is 42.

The square root of 28550787 is about 5343.2936471805. The cubic root of 28550787 is about 305.6370702532.

The spelling of 28550787 in words is "twenty-eight million, five hundred fifty thousand, seven hundred eighty-seven".