28919603 has 2 divisors, whose sum is σ = 28919604. Its totient is φ = 28919602.

The previous prime is 28919591. The next prime is 28919647. The reversal of 28919603 is 30691982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28919603 - 2⁴ = 28919587 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (28919663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14459801 + 14459802.

It is an arithmetic number, because the mean of its divisors is an integer number (14459802).

Almost surely, 2^28919603 is an apocalyptic number.

28919603 is a deficient number, since it is larger than the sum of its proper divisors (1).

28919603 is an equidigital number, since it uses as much as digits as its factorization.

28919603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 28919603 is about 5377.6949523007. The cubic root of 28919603 is about 306.9475059407.

The spelling of 28919603 in words is "twenty-eight million, nine hundred nineteen thousand, six hundred three".