28390259 has 2 divisors, whose sum is σ = 28390260. Its totient is φ = 28390258.

The previous prime is 28390253. The next prime is 28390267. The reversal of 28390259 is 95209382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28390259 - 2⁸ = 28390003 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (28390253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14195129 + 14195130.

It is an arithmetic number, because the mean of its divisors is an integer number (14195130).

Almost surely, 2^28390259 is an apocalyptic number.

28390259 is a deficient number, since it is larger than the sum of its proper divisors (1).

28390259 is an equidigital number, since it uses as much as digits as its factorization.

28390259 is an evil number, because the sum of its binary digits is even.

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

The square root of 28390259 is about 5328.2510263688. The cubic root of 28390259 is about 305.0631742291.

The spelling of 28390259 in words is "twenty-eight million, three hundred ninety thousand, two hundred fifty-nine".