28801375 has 16 divisors (see below), whose sum is σ = 36309312. Its totient is φ = 22807200.

The previous prime is 28801361. The next prime is 28801439. The reversal of 28801375 is 57310882.

It is not a de Polignac number, because 28801375 - 2¹⁷ = 28670303 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28801375.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11757 + ... + 13993.

It is an arithmetic number, because the mean of its divisors is an integer number (2269332).

Almost surely, 2^28801375 is an apocalyptic number.

28801375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28801375 is a deficient number, since it is larger than the sum of its proper divisors (7507937).

28801375 is a wasteful number, since it uses less digits than its factorization.

28801375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2355 (or 2345 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 28801375 is about 5366.6912525317. The cubic root of 28801375 is about 306.5286510070.

The spelling of 28801375 in words is "twenty-eight million, eight hundred one thousand, three hundred seventy-five".