28789693 has 8 divisors (see below), whose sum is σ = 30369600. Its totient is φ = 27216288.

The previous prime is 28789681. The next prime is 28789711. The reversal of 28789693 is 39698782.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28789693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28789693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28789393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9480 + ... + 12142.

It is an arithmetic number, because the mean of its divisors is an integer number (3796200).

Almost surely, 2^28789693 is an apocalyptic number.

It is an amenable number.

28789693 is a deficient number, since it is larger than the sum of its proper divisors (1579907).

28789693 is a wasteful number, since it uses less digits than its factorization.

28789693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3251.

The product of its digits is 1306368, while the sum is 52.

The square root of 28789693 is about 5365.6027620389. The cubic root of 28789693 is about 306.4872021531.

The spelling of 28789693 in words is "twenty-eight million, seven hundred eighty-nine thousand, six hundred ninety-three".