28203001 has 2 divisors, whose sum is σ = 28203002. Its totient is φ = 28203000.

The previous prime is 28202989. The next prime is 28203029. The reversal of 28203001 is 10030282.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28100601 + 102400 = 5301^2 + 320^2 .

It is a cyclic number.

It is not a de Polignac number, because 28203001 - 2¹³ = 28194809 is a prime.

It is not a weakly prime, because it can be changed into another prime (28203031) 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, 14101500 + 14101501.

It is an arithmetic number, because the mean of its divisors is an integer number (14101501).

Almost surely, 2^28203001 is an apocalyptic number.

It is an amenable number.

28203001 is a deficient number, since it is larger than the sum of its proper divisors (1).

28203001 is an equidigital number, since it uses as much as digits as its factorization.

28203001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 28203001 is about 5310.6497719206. The cubic root of 28203001 is about 304.3909767765.

Adding to 28203001 its reverse (10030282), we get a palindrome (38233283).

The spelling of 28203001 in words is "twenty-eight million, two hundred three thousand, one".