28903871 has 2 divisors, whose sum is σ = 28903872. Its totient is φ = 28903870.

The previous prime is 28903843. The next prime is 28903909. The reversal of 28903871 is 17830982.

It is an a-pointer prime, because the next prime (28903909) can be obtained adding 28903871 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28903871 - 2¹⁰ = 28902847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28903841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14451935 + 14451936.

It is an arithmetic number, because the mean of its divisors is an integer number (14451936).

Almost surely, 2^28903871 is an apocalyptic number.

28903871 is a deficient number, since it is larger than the sum of its proper divisors (1).

28903871 is an equidigital number, since it uses as much as digits as its factorization.

28903871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 28903871 is about 5376.2320448433. The cubic root of 28903871 is about 306.8918369647.

The spelling of 28903871 in words is "twenty-eight million, nine hundred three thousand, eight hundred seventy-one".