28351729 has 8 divisors (see below), whose sum is σ = 32566400. Its totient is φ = 24178176.

The previous prime is 28351727. The next prime is 28351747. The reversal of 28351729 is 92715382.

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 28351729 - 2¹ = 28351727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28351723) 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, 8784 + ... + 11569.

It is an arithmetic number, because the mean of its divisors is an integer number (4070800).

Almost surely, 2^28351729 is an apocalyptic number.

It is an amenable number.

28351729 is a deficient number, since it is larger than the sum of its proper divisors (4214671).

28351729 is a wasteful number, since it uses less digits than its factorization.

28351729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20559.

The product of its digits is 30240, while the sum is 37.

The square root of 28351729 is about 5324.6341658371. The cubic root of 28351729 is about 304.9251056814.

The spelling of 28351729 in words is "twenty-eight million, three hundred fifty-one thousand, seven hundred twenty-nine".