28502399 has 2 divisors, whose sum is σ = 28502400. Its totient is φ = 28502398.

The previous prime is 28502371. The next prime is 28502401. The reversal of 28502399 is 99320582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28502399 - 2⁸ = 28502143 is a prime.

Together with 28502401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28502599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14251199 + 14251200.

It is an arithmetic number, because the mean of its divisors is an integer number (14251200).

Almost surely, 2^28502399 is an apocalyptic number.

28502399 is a deficient number, since it is larger than the sum of its proper divisors (1).

28502399 is an equidigital number, since it uses as much as digits as its factorization.

28502399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 28502399 is about 5338.7638082238. The cubic root of 28502399 is about 305.4643075976.

The spelling of 28502399 in words is "twenty-eight million, five hundred two thousand, three hundred ninety-nine".