28340503 has 2 divisors, whose sum is σ = 28340504. Its totient is φ = 28340502.

The previous prime is 28340491. The next prime is 28340519. The reversal of 28340503 is 30504382.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28340503 is a prime.

It is a super-2 number, since 2×28340503² = 1606368220586018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28340203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14170251 + 14170252.

It is an arithmetic number, because the mean of its divisors is an integer number (14170252).

Almost surely, 2^28340503 is an apocalyptic number.

28340503 is a deficient number, since it is larger than the sum of its proper divisors (1).

28340503 is an equidigital number, since it uses as much as digits as its factorization.

28340503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 28340503 is about 5323.5799045379. The cubic root of 28340503 is about 304.8848548601.

Adding to 28340503 its reverse (30504382), we get a palindrome (58844885).

The spelling of 28340503 in words is "twenty-eight million, three hundred forty thousand, five hundred three".