28787903 has 2 divisors, whose sum is σ = 28787904. Its totient is φ = 28787902.

The previous prime is 28787893. The next prime is 28787909. The reversal of 28787903 is 30978782.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28787903 - 2⁶ = 28787839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28787909) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14393951 + 14393952.

It is an arithmetic number, because the mean of its divisors is an integer number (14393952).

Almost surely, 2^28787903 is an apocalyptic number.

28787903 is a deficient number, since it is larger than the sum of its proper divisors (1).

28787903 is an equidigital number, since it uses as much as digits as its factorization.

28787903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 28787903 is about 5365.4359561922. The cubic root of 28787903 is about 306.4808500712.

The spelling of 28787903 in words is "twenty-eight million, seven hundred eighty-seven thousand, nine hundred three".