28806875 has 10 divisors (see below), whose sum is σ = 35997852. Its totient is φ = 23045000.

The previous prime is 28806871. The next prime is 28806919. The reversal of 28806875 is 57860882.

It is not a de Polignac number, because 28806875 - 2² = 28806871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28806871) 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 9 ways as a sum of consecutive naturals, for example, 22421 + ... + 23670.

Almost surely, 2^28806875 is an apocalyptic number.

28806875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28806875 is a deficient number, since it is larger than the sum of its proper divisors (7190977).

28806875 is an frugal number, since it uses more digits than its factorization.

28806875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46111 (or 46096 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 44.

The square root of 28806875 is about 5367.2036480834. The cubic root of 28806875 is about 306.5481616527.

The spelling of 28806875 in words is "twenty-eight million, eight hundred six thousand, eight hundred seventy-five".