28237403 has 2 divisors, whose sum is σ = 28237404. Its totient is φ = 28237402.

The previous prime is 28237381. The next prime is 28237411. The reversal of 28237403 is 30473282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28237403 - 2⁸ = 28237147 is a prime.

It is not a weakly prime, because it can be changed into another prime (28237423) 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 as a sum of consecutive naturals, namely, 14118701 + 14118702.

It is an arithmetic number, because the mean of its divisors is an integer number (14118702).

Almost surely, 2^28237403 is an apocalyptic number.

28237403 is a deficient number, since it is larger than the sum of its proper divisors (1).

28237403 is an equidigital number, since it uses as much as digits as its factorization.

28237403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 28237403 is about 5313.8877481558. The cubic root of 28237403 is about 304.5146917846.

The spelling of 28237403 in words is "twenty-eight million, two hundred thirty-seven thousand, four hundred three".