28647895 has 4 divisors (see below), whose sum is σ = 34377480. Its totient is φ = 22918312.

The previous prime is 28647893. The next prime is 28647919. The reversal of 28647895 is 59874682.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28647895 - 2¹ = 28647893 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28647893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2864785 + ... + 2864794.

It is an arithmetic number, because the mean of its divisors is an integer number (8594370).

Almost surely, 2^28647895 is an apocalyptic number.

28647895 is a deficient number, since it is larger than the sum of its proper divisors (5729585).

28647895 is an equidigital number, since it uses as much as digits as its factorization.

28647895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5729584.

The product of its digits is 967680, while the sum is 49.

The square root of 28647895 is about 5352.3728382840. The cubic root of 28647895 is about 305.9831928627.

The spelling of 28647895 in words is "twenty-eight million, six hundred forty-seven thousand, eight hundred ninety-five".