28447603 has 2 divisors, whose sum is σ = 28447604. Its totient is φ = 28447602.

The previous prime is 28447577. The next prime is 28447607. The reversal of 28447603 is 30674482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28447603 - 2⁵ = 28447571 is a prime.

It is a super-2 number, since 2×28447603² = 1618532232891218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28447607) 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 as a sum of consecutive naturals, namely, 14223801 + 14223802.

It is an arithmetic number, because the mean of its divisors is an integer number (14223802).

Almost surely, 2^28447603 is an apocalyptic number.

28447603 is a deficient number, since it is larger than the sum of its proper divisors (1).

28447603 is an equidigital number, since it uses as much as digits as its factorization.

28447603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 28447603 is about 5333.6294396968. The cubic root of 28447603 is about 305.2684298154.

The spelling of 28447603 in words is "twenty-eight million, four hundred forty-seven thousand, six hundred three".