28238703 has 4 divisors (see below), whose sum is σ = 37651608. Its totient is φ = 18825800.

The previous prime is 28238701. The next prime is 28238719. The reversal of 28238703 is 30783282.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28238703 - 2¹ = 28238701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28238701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4706448 + ... + 4706453.

It is an arithmetic number, because the mean of its divisors is an integer number (9412902).

Almost surely, 2^28238703 is an apocalyptic number.

28238703 is a deficient number, since it is larger than the sum of its proper divisors (9412905).

28238703 is an equidigital number, since it uses as much as digits as its factorization.

28238703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9412904.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 28238703 is about 5314.0100677360. The cubic root of 28238703 is about 304.5193648185.

The spelling of 28238703 in words is "twenty-eight million, two hundred thirty-eight thousand, seven hundred three".