28501003 has 2 divisors, whose sum is σ = 28501004. Its totient is φ = 28501002.

The previous prime is 28501001. The next prime is 28501021. The reversal of 28501003 is 30010582.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28501003 - 2¹ = 28501001 is a prime.

Together with 28501001, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28501001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14250501 + 14250502.

It is an arithmetic number, because the mean of its divisors is an integer number (14250502).

Almost surely, 2^28501003 is an apocalyptic number.

28501003 is a deficient number, since it is larger than the sum of its proper divisors (1).

28501003 is an equidigital number, since it uses as much as digits as its factorization.

28501003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 28501003 is about 5338.6330647461. The cubic root of 28501003 is about 305.4593204719.

Adding to 28501003 its reverse (30010582), we get a palindrome (58511585).

The spelling of 28501003 in words is "twenty-eight million, five hundred one thousand, three".