28302575 has 12 divisors (see below), whose sum is σ = 40109040. Its totient is φ = 19407360.

The previous prime is 28302559. The next prime is 28302577. The reversal of 28302575 is 57520382.

It is not a de Polignac number, because 28302575 - 2⁴ = 28302559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28302577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80690 + ... + 81039.

It is an arithmetic number, because the mean of its divisors is an integer number (3342420).

Almost surely, 2^28302575 is an apocalyptic number.

28302575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28302575 is a deficient number, since it is larger than the sum of its proper divisors (11806465).

28302575 is a wasteful number, since it uses less digits than its factorization.

28302575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161746 (or 161741 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 28302575 is about 5320.0164473430. The cubic root of 28302575 is about 304.7487853491.

The spelling of 28302575 in words is "twenty-eight million, three hundred two thousand, five hundred seventy-five".