28888375 has 8 divisors (see below), whose sum is σ = 36052848. Its totient is φ = 23110600.

The previous prime is 28888369. The next prime is 28888397. The reversal of 28888375 is 57388882.

It is not a de Polignac number, because 28888375 - 2³ = 28888367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115429 + ... + 115678.

It is an arithmetic number, because the mean of its divisors is an integer number (4506606).

Almost surely, 2^28888375 is an apocalyptic number.

28888375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28888375 is a deficient number, since it is larger than the sum of its proper divisors (7164473).

28888375 is an equidigital number, since it uses as much as digits as its factorization.

28888375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231122 (or 231112 counting only the distinct ones).

The product of its digits is 860160, while the sum is 49.

The square root of 28888375 is about 5374.7906935991. The cubic root of 28888375 is about 306.8369833430.

The spelling of 28888375 in words is "twenty-eight million, eight hundred eighty-eight thousand, three hundred seventy-five".