28395287 has 8 divisors (see below), whose sum is σ = 31036032. Its totient is φ = 25862400.

The previous prime is 28395281. The next prime is 28395293. The reversal of 28395287 is 78259382.

It is an interprime number because it is at equal distance from previous prime (28395281) and next prime (28395293).

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

It is a cyclic number.

It is not a de Polignac number, because 28395287 - 2⁶ = 28395223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28395281) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 26414 + ... + 27467.

It is an arithmetic number, because the mean of its divisors is an integer number (3879504).

Almost surely, 2^28395287 is an apocalyptic number.

28395287 is a deficient number, since it is larger than the sum of its proper divisors (2640745).

28395287 is a wasteful number, since it uses less digits than its factorization.

28395287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53929.

The product of its digits is 241920, while the sum is 44.

The square root of 28395287 is about 5328.7228300973. The cubic root of 28395287 is about 305.0811823671.

It can be divided in two parts, 28395 and 287, that added together give a palindrome (28682).

The spelling of 28395287 in words is "twenty-eight million, three hundred ninety-five thousand, two hundred eighty-seven".