28788003 has 6 divisors (see below), whose sum is σ = 41582684. Its totient is φ = 19191996.

The previous prime is 28787989. The next prime is 28788007. The reversal of 28788003 is 30088782.

It is not a de Polignac number, because 28788003 - 2⁵ = 28787971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28788007) 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 in 5 ways as a sum of consecutive naturals, for example, 1599325 + ... + 1599342.

Almost surely, 2^28788003 is an apocalyptic number.

28788003 is a deficient number, since it is larger than the sum of its proper divisors (12794681).

28788003 is a wasteful number, since it uses less digits than its factorization.

28788003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3198673 (or 3198670 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 28788003 is about 5365.4452750913. The cubic root of 28788003 is about 306.4812049431.

The spelling of 28788003 in words is "twenty-eight million, seven hundred eighty-eight thousand, three".