28903875 has 144 divisors (see below), whose sum is σ = 66227616. Its totient is φ = 11088000.

The previous prime is 28903871. The next prime is 28903909. The reversal of 28903875 is 57830982.

It is not a de Polignac number, because 28903875 - 2² = 28903871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28903871) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2223369 + ... + 2223381.

It is an arithmetic number, because the mean of its divisors is an integer number (459914).

Almost surely, 2^28903875 is an apocalyptic number.

28903875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28903875 is an abundant number, since it is smaller than the sum of its proper divisors (37323741).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28903875 is a wasteful number, since it uses less digits than its factorization.

28903875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 39 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 28903875 is about 5376.2324168510. The cubic root of 28903875 is about 306.8918511216.

The spelling of 28903875 in words is "twenty-eight million, nine hundred three thousand, eight hundred seventy-five".