28347863 has 2 divisors, whose sum is σ = 28347864. Its totient is φ = 28347862.

The previous prime is 28347853. The next prime is 28347899. The reversal of 28347863 is 36874382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28347863 - 2¹⁰ = 28346839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28347863.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28347853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14173931 + 14173932.

It is an arithmetic number, because the mean of its divisors is an integer number (14173932).

Almost surely, 2^28347863 is an apocalyptic number.

28347863 is a deficient number, since it is larger than the sum of its proper divisors (1).

28347863 is an equidigital number, since it uses as much as digits as its factorization.

28347863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 41.

The square root of 28347863 is about 5324.2711238253. The cubic root of 28347863 is about 304.9112453387.

The spelling of 28347863 in words is "twenty-eight million, three hundred forty-seven thousand, eight hundred sixty-three".