28763843 has 2 divisors, whose sum is σ = 28763844. Its totient is φ = 28763842.

The previous prime is 28763807. The next prime is 28763893. The reversal of 28763843 is 34836782.

Added to its reverse (34836782) it gives a square (63600625 = 7975²).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28763843 - 2¹⁰ = 28762819 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28763843.

It is not a weakly prime, because it can be changed into another prime (28763893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14381921 + 14381922.

It is an arithmetic number, because the mean of its divisors is an integer number (14381922).

Almost surely, 2^28763843 is an apocalyptic number.

28763843 is a deficient number, since it is larger than the sum of its proper divisors (1).

28763843 is an equidigital number, since it uses as much as digits as its factorization.

28763843 is an odious number, because the sum of its binary digits is odd.

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

The square root of 28763843 is about 5363.1933584386. The cubic root of 28763843 is about 306.3954440067.

Adding to 28763843 its reverse (34836782), we get a square (63600625 = 7975²).

The spelling of 28763843 in words is "twenty-eight million, seven hundred sixty-three thousand, eight hundred forty-three".