28736329 has 4 divisors (see below), whose sum is σ = 29100160. Its totient is φ = 28372500.

The previous prime is 28736299. The next prime is 28736333. The reversal of 28736329 is 92363782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28736329 - 2¹¹ = 28734281 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28736291 and 28736300.

It is not an unprimeable number, because it can be changed into a prime (28736359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181797 + ... + 181954.

It is an arithmetic number, because the mean of its divisors is an integer number (7275040).

Almost surely, 2^28736329 is an apocalyptic number.

It is an amenable number.

28736329 is a deficient number, since it is larger than the sum of its proper divisors (363831).

28736329 is an equidigital number, since it uses as much as digits as its factorization.

28736329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363830.

The product of its digits is 108864, while the sum is 40.

The square root of 28736329 is about 5360.6276684732. The cubic root of 28736329 is about 306.2977188449.

The spelling of 28736329 in words is "twenty-eight million, seven hundred thirty-six thousand, three hundred twenty-nine".