28504875 has 32 divisors (see below), whose sum is σ = 54213120. Its totient is φ = 13029600.

The previous prime is 28504871. The next prime is 28504877. The reversal of 28504875 is 57840582.

It is not a de Polignac number, because 28504875 - 2² = 28504871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28504871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2805 + ... + 8054.

It is an arithmetic number, because the mean of its divisors is an integer number (1694160).

Almost surely, 2^28504875 is an apocalyptic number.

28504875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28504875 is a deficient number, since it is larger than the sum of its proper divisors (25708245).

28504875 is a wasteful number, since it uses less digits than its factorization.

28504875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10884 (or 10874 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 39.

The square root of 28504875 is about 5338.9956920754. The cubic root of 28504875 is about 305.4731525574.

The spelling of 28504875 in words is "twenty-eight million, five hundred four thousand, eight hundred seventy-five".