28550885 has 8 divisors (see below), whose sum is σ = 37375776. Its totient is φ = 20764240.

The previous prime is 28550869. The next prime is 28550887. The reversal of 28550885 is 58805582.

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

It is not a de Polignac number, because 28550885 - 2⁴ = 28550869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28550887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259499 + ... + 259608.

It is an arithmetic number, because the mean of its divisors is an integer number (4671972).

Almost surely, 2^28550885 is an apocalyptic number.

It is an amenable number.

28550885 is a deficient number, since it is larger than the sum of its proper divisors (8824891).

28550885 is a wasteful number, since it uses less digits than its factorization.

28550885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519123.

The product of its (nonzero) digits is 128000, while the sum is 41.

The square root of 28550885 is about 5343.3028175465. The cubic root of 28550885 is about 305.6374199505.

The spelling of 28550885 in words is "twenty-eight million, five hundred fifty thousand, eight hundred eighty-five".