28350239 has 2 divisors, whose sum is σ = 28350240. Its totient is φ = 28350238.

The previous prime is 28350233. The next prime is 28350253. The reversal of 28350239 is 93205382.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28350239 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28350233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14175119 + 14175120.

It is an arithmetic number, because the mean of its divisors is an integer number (14175120).

Almost surely, 2^28350239 is an apocalyptic number.

28350239 is a deficient number, since it is larger than the sum of its proper divisors (1).

28350239 is an equidigital number, since it uses as much as digits as its factorization.

28350239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 28350239 is about 5324.4942482831. The cubic root of 28350239 is about 304.9197638982.

The spelling of 28350239 in words is "twenty-eight million, three hundred fifty thousand, two hundred thirty-nine".