28822729 has 8 divisors (see below), whose sum is σ = 31247552. Its totient is φ = 26427600.

The previous prime is 28822727. The next prime is 28822733. The reversal of 28822729 is 92722882.

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 28822729 - 2¹ = 28822727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28822691 and 28822700.

It is not an unprimeable number, because it can be changed into a prime (28822721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5379 + ... + 9304.

It is an arithmetic number, because the mean of its divisors is an integer number (3905944).

Almost surely, 2^28822729 is an apocalyptic number.

It is an amenable number.

28822729 is a deficient number, since it is larger than the sum of its proper divisors (2424823).

28822729 is a wasteful number, since it uses less digits than its factorization.

28822729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14847.

The product of its digits is 64512, while the sum is 40.

The square root of 28822729 is about 5368.6803778955. The cubic root of 28822729 is about 306.6043880831.

The spelling of 28822729 in words is "twenty-eight million, eight hundred twenty-two thousand, seven hundred twenty-nine".