28719243 has 18 divisors (see below), whose sum is σ = 48256884. Its totient is φ = 16410744.

The previous prime is 28719233. The next prime is 28719263. The reversal of 28719243 is 34291782.

It is not a de Polignac number, because 28719243 - 2⁹ = 28718731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28719198 and 28719207.

It is not an unprimeable number, because it can be changed into a prime (28719233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 32121 + ... + 33002.

It is an arithmetic number, because the mean of its divisors is an integer number (2680938).

Almost surely, 2^28719243 is an apocalyptic number.

28719243 is a deficient number, since it is larger than the sum of its proper divisors (19537641).

28719243 is a wasteful number, since it uses less digits than its factorization.

28719243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65143 (or 65133 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 28719243 is about 5359.0337748516. The cubic root of 28719243 is about 306.2370008088.

The spelling of 28719243 in words is "twenty-eight million, seven hundred nineteen thousand, two hundred forty-three".