28947895 has 8 divisors (see below), whose sum is σ = 34778304. Its totient is φ = 23131104.

The previous prime is 28947883. The next prime is 28947943. The reversal of 28947895 is 59874982.

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 28947895 - 2⁹ = 28947383 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 2082 + ... + 7888.

It is an arithmetic number, because the mean of its divisors is an integer number (4347288).

Almost surely, 2^28947895 is an apocalyptic number.

28947895 is a deficient number, since it is larger than the sum of its proper divisors (5830409).

28947895 is an equidigital number, since it uses as much as digits as its factorization.

28947895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6809.

The product of its digits is 1451520, while the sum is 52.

The square root of 28947895 is about 5380.3248043218. The cubic root of 28947895 is about 307.0475687306.

It can be divided in two parts, 289 and 47895, that added together give a palindrome (48184).

The spelling of 28947895 in words is "twenty-eight million, nine hundred forty-seven thousand, eight hundred ninety-five".