28705067 has 8 divisors (see below), whose sum is σ = 30373200. Its totient is φ = 27052704.

The previous prime is 28705049. The next prime is 28705069. The reversal of 28705067 is 76050782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28705067 - 2⁸ = 28704811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28705069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92 + ... + 7577.

It is an arithmetic number, because the mean of its divisors is an integer number (3796650).

Almost surely, 2^28705067 is an apocalyptic number.

28705067 is a deficient number, since it is larger than the sum of its proper divisors (1668133).

28705067 is a wasteful number, since it uses less digits than its factorization.

28705067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7885.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 28705067 is about 5357.7109851130. The cubic root of 28705067 is about 306.1866056759.

The spelling of 28705067 in words is "twenty-eight million, seven hundred five thousand, sixty-seven".