28448003 has 4 divisors (see below), whose sum is σ = 28478808. Its totient is φ = 28417200.

The previous prime is 28447981. The next prime is 28448011. The reversal of 28448003 is 30084482.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28448003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28448023) 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, 13973 + ... + 15878.

It is an arithmetic number, because the mean of its divisors is an integer number (7119702).

Almost surely, 2^28448003 is an apocalyptic number.

28448003 is a deficient number, since it is larger than the sum of its proper divisors (30805).

28448003 is an equidigital number, since it uses as much as digits as its factorization.

28448003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30804.

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 28448003 is about 5333.6669374831. Note that the first 3 decimals coincide. The cubic root of 28448003 is about 305.2698605956.

The spelling of 28448003 in words is "twenty-eight million, four hundred forty-eight thousand, three".