28140803 has 2 divisors, whose sum is σ = 28140804. Its totient is φ = 28140802.

The previous prime is 28140793. The next prime is 28140811. The reversal of 28140803 is 30804182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28140803 - 2¹² = 28136707 is a prime.

It is not a weakly prime, because it can be changed into another prime (28140863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14070401 + 14070402.

It is an arithmetic number, because the mean of its divisors is an integer number (14070402).

Almost surely, 2^28140803 is an apocalyptic number.

28140803 is a deficient number, since it is larger than the sum of its proper divisors (1).

28140803 is an equidigital number, since it uses as much as digits as its factorization.

28140803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 28140803 is about 5304.7905707954. The cubic root of 28140803 is about 304.1670473588.

Adding to 28140803 its reverse (30804182), we get a palindrome (58944985).

The spelling of 28140803 in words is "twenty-eight million, one hundred forty thousand, eight hundred three".