28451503 has 2 divisors, whose sum is σ = 28451504. Its totient is φ = 28451502.

The previous prime is 28451473. The next prime is 28451519. The reversal of 28451503 is 30515482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28451503 - 2²¹ = 26354351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28451593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14225751 + 14225752.

It is an arithmetic number, because the mean of its divisors is an integer number (14225752).

Almost surely, 2^28451503 is an apocalyptic number.

28451503 is a deficient number, since it is larger than the sum of its proper divisors (1).

28451503 is an equidigital number, since it uses as much as digits as its factorization.

28451503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 28451503 is about 5333.9950318687. The cubic root of 28451503 is about 305.2823793501.

Adding to 28451503 its reverse (30515482), we get a palindrome (58966985).

The spelling of 28451503 in words is "twenty-eight million, four hundred fifty-one thousand, five hundred three".