28398003 has 8 divisors (see below), whose sum is σ = 38105808. Its totient is φ = 18811104.

The previous prime is 28397987. The next prime is 28398037. The reversal of 28398003 is 30089382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28398003 - 2⁴ = 28397987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28398053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29676 + ... + 30617.

It is an arithmetic number, because the mean of its divisors is an integer number (4763226).

Almost surely, 2^28398003 is an apocalyptic number.

28398003 is a deficient number, since it is larger than the sum of its proper divisors (9707805).

28398003 is a wasteful number, since it uses less digits than its factorization.

28398003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60453.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 28398003 is about 5328.9776693096. The cubic root of 28398003 is about 305.0909090290.

The spelling of 28398003 in words is "twenty-eight million, three hundred ninety-eight thousand, three".