28835729 has 8 divisors (see below), whose sum is σ = 31097472. Its totient is φ = 26580240.

The previous prime is 28835717. The next prime is 28835743. The reversal of 28835729 is 92753882.

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 28835729 - 2⁸ = 28835473 is a prime.

It is a super-2 number, since 2×28835729² = 1662998533922882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28835729.

It is not an unprimeable number, because it can be changed into a prime (28835759) 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, 13334 + ... + 15344.

It is an arithmetic number, because the mean of its divisors is an integer number (3887184).

Almost surely, 2^28835729 is an apocalyptic number.

It is an amenable number.

28835729 is a deficient number, since it is larger than the sum of its proper divisors (2261743).

28835729 is a wasteful number, since it uses less digits than its factorization.

28835729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3127.

The product of its digits is 241920, while the sum is 44.

The square root of 28835729 is about 5369.8909672357. The cubic root of 28835729 is about 306.6504773800.

The spelling of 28835729 in words is "twenty-eight million, eight hundred thirty-five thousand, seven hundred twenty-nine".