28219843 has 2 divisors, whose sum is σ = 28219844. Its totient is φ = 28219842.

The previous prime is 28219831. The next prime is 28219861. The reversal of 28219843 is 34891282.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28219843 is a prime.

It is not a weakly prime, because it can be changed into another prime (28219343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14109921 + 14109922.

It is an arithmetic number, because the mean of its divisors is an integer number (14109922).

Almost surely, 2^28219843 is an apocalyptic number.

28219843 is a deficient number, since it is larger than the sum of its proper divisors (1).

28219843 is an equidigital number, since it uses as much as digits as its factorization.

28219843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 37.

The square root of 28219843 is about 5312.2352169308. The cubic root of 28219843 is about 304.4515558226.

The spelling of 28219843 in words is "twenty-eight million, two hundred nineteen thousand, eight hundred forty-three".