28963447 has 4 divisors (see below), whose sum is σ = 29012400. Its totient is φ = 28914496.

The previous prime is 28963409. The next prime is 28963469. The reversal of 28963447 is 74436982.

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 28963447 - 2¹¹ = 28961399 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 (28963147) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 23578 + ... + 24775.

It is an arithmetic number, because the mean of its divisors is an integer number (7253100).

Almost surely, 2^28963447 is an apocalyptic number.

28963447 is a deficient number, since it is larger than the sum of its proper divisors (48953).

28963447 is an equidigital number, since it uses as much as digits as its factorization.

28963447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48952.

The product of its digits is 290304, while the sum is 43.

The square root of 28963447 is about 5381.7698761653. The cubic root of 28963447 is about 307.1025450815.

It can be divided in two parts, 289 and 63447, that added together give a palindrome (63736).

The spelling of 28963447 in words is "twenty-eight million, nine hundred sixty-three thousand, four hundred forty-seven".