28803975 has 24 divisors (see below), whose sum is σ = 48284112. Its totient is φ = 15148800.

The previous prime is 28803959. The next prime is 28803979. The reversal of 28803975 is 57930882.

It is not a de Polignac number, because 28803975 - 2⁴ = 28803959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28803979) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2845 + ... + 8105.

It is an arithmetic number, because the mean of its divisors is an integer number (2011838).

Almost surely, 2^28803975 is an apocalyptic number.

28803975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28803975 is a deficient number, since it is larger than the sum of its proper divisors (19480137).

28803975 is a wasteful number, since it uses less digits than its factorization.

28803975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5347 (or 5342 counting only the distinct ones).

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

The square root of 28803975 is about 5366.9334819802. The cubic root of 28803975 is about 306.5378745309.

The spelling of 28803975 in words is "twenty-eight million, eight hundred three thousand, nine hundred seventy-five".