28653709 has 8 divisors (see below), whose sum is σ = 32795840. Its totient is φ = 24523776.

The previous prime is 28653707. The next prime is 28653727. The reversal of 28653709 is 90735682.

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 28653709 - 2¹ = 28653707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28653707) 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 7 ways as a sum of consecutive naturals, for example, 2722 + ... + 8044.

It is an arithmetic number, because the mean of its divisors is an integer number (4099480).

Almost surely, 2^28653709 is an apocalyptic number.

It is an amenable number.

28653709 is a deficient number, since it is larger than the sum of its proper divisors (4142131).

28653709 is an equidigital number, since it uses as much as digits as its factorization.

28653709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6099.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 28653709 is about 5352.9159343296. The cubic root of 28653709 is about 306.0038909041.

The spelling of 28653709 in words is "twenty-eight million, six hundred fifty-three thousand, seven hundred nine".