28329375 has 40 divisors (see below), whose sum is σ = 48921840. Its totient is φ = 14560000.

The previous prime is 28329359. The next prime is 28329397. The reversal of 28329375 is 57392382.

It is not a de Polignac number, because 28329375 - 2⁴ = 28329359 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 54115 + ... + 54635.

It is an arithmetic number, because the mean of its divisors is an integer number (1223046).

Almost surely, 2^28329375 is an apocalyptic number.

28329375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28329375 is a deficient number, since it is larger than the sum of its proper divisors (20592465).

28329375 is an equidigital number, since it uses as much as digits as its factorization.

28329375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573 (or 558 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The square root of 28329375 is about 5322.5346405636. The cubic root of 28329375 is about 304.8449449260.

The spelling of 28329375 in words is "twenty-eight million, three hundred twenty-nine thousand, three hundred seventy-five".