28303879 has 2 divisors, whose sum is σ = 28303880. Its totient is φ = 28303878.

The previous prime is 28303871. The next prime is 28303897. The reversal of 28303879 is 97830382.

It is a happy number.

Together with next prime (28303897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28303879 - 2³ = 28303871 is a prime.

It is a super-2 number, since 2×28303879² = 1602219132893282, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28303871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14151939 + 14151940.

It is an arithmetic number, because the mean of its divisors is an integer number (14151940).

Almost surely, 2^28303879 is an apocalyptic number.

28303879 is a deficient number, since it is larger than the sum of its proper divisors (1).

28303879 is an equidigital number, since it uses as much as digits as its factorization.

28303879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 28303879 is about 5320.1390019435. The cubic root of 28303879 is about 304.7534655630.

The spelling of 28303879 in words is "twenty-eight million, three hundred three thousand, eight hundred seventy-nine".