28824647 has 4 divisors (see below), whose sum is σ = 28835400. Its totient is φ = 28813896.

The previous prime is 28824643. The next prime is 28824659. The reversal of 28824647 is 74642882.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28824647 - 2² = 28824643 is a prime.

It is a Duffinian number.

Its product of digits (172032) is a multiple of the sum of its prime divisors (10752).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28824643) 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, 2273 + ... + 7925.

It is an arithmetic number, because the mean of its divisors is an integer number (7208850).

Almost surely, 2^28824647 is an apocalyptic number.

28824647 is a deficient number, since it is larger than the sum of its proper divisors (10753).

28824647 is an equidigital number, since it uses as much as digits as its factorization.

28824647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10752.

The product of its digits is 172032, while the sum is 41.

The square root of 28824647 is about 5368.8590035500. The cubic root of 28824647 is about 306.6111888984.

The spelling of 28824647 in words is "twenty-eight million, eight hundred twenty-four thousand, six hundred forty-seven".