28045403 has 2 divisors, whose sum is σ = 28045404. Its totient is φ = 28045402.

The previous prime is 28045379. The next prime is 28045447. The reversal of 28045403 is 30454082.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28045403 is a prime.

It is a Sophie Germain prime.

It is equal to p_1744118 and since 28045403 and 1744118 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (28044403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14022701 + 14022702.

It is an arithmetic number, because the mean of its divisors is an integer number (14022702).

Almost surely, 2^28045403 is an apocalyptic number.

28045403 is a deficient number, since it is larger than the sum of its proper divisors (1).

28045403 is an equidigital number, since it uses as much as digits as its factorization.

28045403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 28045403 is about 5295.7910646097. The cubic root of 28045403 is about 303.8229398014.

Adding to 28045403 its reverse (30454082), we get a palindrome (58499485).

The spelling of 28045403 in words is "twenty-eight million, forty-five thousand, four hundred three".