28719843 has 16 divisors (see below), whose sum is σ = 39177600. Its totient is φ = 18708480.

The previous prime is 28719833. The next prime is 28719871. The reversal of 28719843 is 34891782.

It is not a de Polignac number, because 28719843 - 2⁴ = 28719827 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28719795 and 28719804.

It is not an unprimeable number, because it can be changed into a prime (28719833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36963 + ... + 37731.

It is an arithmetic number, because the mean of its divisors is an integer number (2448600).

Almost surely, 2^28719843 is an apocalyptic number.

28719843 is a deficient number, since it is larger than the sum of its proper divisors (10457757).

28719843 is a wasteful number, since it uses less digits than its factorization.

28719843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042.

The product of its digits is 96768, while the sum is 42.

The square root of 28719843 is about 5359.0897547998. The cubic root of 28719843 is about 306.2391334198.

The spelling of 28719843 in words is "twenty-eight million, seven hundred nineteen thousand, eight hundred forty-three".