28801603 has 2 divisors, whose sum is σ = 28801604. Its totient is φ = 28801602.

The previous prime is 28801547. The next prime is 28801613. The reversal of 28801603 is 30610882.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28801603 is a prime.

It is not a weakly prime, because it can be changed into another prime (28801613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14400801 + 14400802.

It is an arithmetic number, because the mean of its divisors is an integer number (14400802).

Almost surely, 2^28801603 is an apocalyptic number.

28801603 is a deficient number, since it is larger than the sum of its proper divisors (1).

28801603 is an equidigital number, since it uses as much as digits as its factorization.

28801603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 28801603 is about 5366.7124946283. The cubic root of 28801603 is about 306.5294598613.

The spelling of 28801603 in words is "twenty-eight million, eight hundred one thousand, six hundred three".