28331003 has 2 divisors, whose sum is σ = 28331004. Its totient is φ = 28331002.

The previous prime is 28330997. The next prime is 28331029. The reversal of 28331003 is 30013382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28331003 - 2⁴ = 28330987 is a prime.

It is not a weakly prime, because it can be changed into another prime (28331053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14165501 + 14165502.

It is an arithmetic number, because the mean of its divisors is an integer number (14165502).

Almost surely, 2^28331003 is an apocalyptic number.

28331003 is a deficient number, since it is larger than the sum of its proper divisors (1).

28331003 is an equidigital number, since it uses as much as digits as its factorization.

28331003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 28331003 is about 5322.6875730217. The cubic root of 28331003 is about 304.8507843073.

Adding to 28331003 its reverse (30013382), we get a palindrome (58344385).

The spelling of 28331003 in words is "twenty-eight million, three hundred thirty-one thousand, three".