28797895 has 16 divisors (see below), whose sum is σ = 39677760. Its totient is φ = 19655424.

The previous prime is 28797889. The next prime is 28797907. The reversal of 28797895 is 59879782.

It is a cyclic number.

It is not a de Polignac number, because 28797895 - 2¹¹ = 28795847 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 (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6219 + ... + 9811.

It is an arithmetic number, because the mean of its divisors is an integer number (2479860).

Almost surely, 2^28797895 is an apocalyptic number.

28797895 is a deficient number, since it is larger than the sum of its proper divisors (10879865).

28797895 is a wasteful number, since it uses less digits than its factorization.

28797895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3834.

The product of its digits is 2540160, while the sum is 55.

The square root of 28797895 is about 5366.3670206202. The cubic root of 28797895 is about 306.5163048062.

It can be divided in two parts, 28797 and 895, that added together give a palindrome (29692).

The spelling of 28797895 in words is "twenty-eight million, seven hundred ninety-seven thousand, eight hundred ninety-five".