28288895 has 8 divisors (see below), whose sum is σ = 35041920. Its totient is φ = 21900960.

The previous prime is 28288889. The next prime is 28288903. The reversal of 28288895 is 59888282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28288895 - 2⁸ = 28288639 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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91100 + ... + 91409.

It is an arithmetic number, because the mean of its divisors is an integer number (4380240).

Almost surely, 2^28288895 is an apocalyptic number.

28288895 is a deficient number, since it is larger than the sum of its proper divisors (6753025).

28288895 is a wasteful number, since it uses less digits than its factorization.

28288895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182545.

The product of its digits is 737280, while the sum is 50.

The square root of 28288895 is about 5318.7305816332. The cubic root of 28288895 is about 304.6996775058.

The spelling of 28288895 in words is "twenty-eight million, two hundred eighty-eight thousand, eight hundred ninety-five".