28061003 has 4 divisors (see below), whose sum is σ = 28107840. Its totient is φ = 28014168.

The previous prime is 28060997. The next prime is 28061017. The reversal of 28061003 is 30016082.

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 28061003 - 2⁴ = 28060987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28061023) 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 3 ways as a sum of consecutive naturals, for example, 22508 + ... + 23721.

It is an arithmetic number, because the mean of its divisors is an integer number (7026960).

Almost surely, 2^28061003 is an apocalyptic number.

28061003 is a deficient number, since it is larger than the sum of its proper divisors (46837).

28061003 is an equidigital number, since it uses as much as digits as its factorization.

28061003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46836.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 28061003 is about 5297.2637276239. The cubic root of 28061003 is about 303.8792622742.

Adding to 28061003 its reverse (30016082), we get a palindrome (58077085).

The spelling of 28061003 in words is "twenty-eight million, sixty-one thousand, three".