28713329 has 8 divisors (see below), whose sum is σ = 29033640. Its totient is φ = 28395136.

The previous prime is 28713317. The next prime is 28713331. The reversal of 28713329 is 92331782.

It can be written as a sum of positive squares in 4 ways, for example, as 112225 + 28601104 = 335^2 + 5348^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28713329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28713359) 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, 46229 + ... + 46845.

It is an arithmetic number, because the mean of its divisors is an integer number (3629205).

Almost surely, 2^28713329 is an apocalyptic number.

It is an amenable number.

28713329 is a deficient number, since it is larger than the sum of its proper divisors (320311).

28713329 is a wasteful number, since it uses less digits than its factorization.

28713329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059.

The product of its digits is 18144, while the sum is 35.

The square root of 28713329 is about 5358.4819678711. The cubic root of 28713329 is about 306.2159787836.

It can be divided in two parts, 2871 and 3329, that multiplied together give a palindrome (9557559).

The spelling of 28713329 in words is "twenty-eight million, seven hundred thirteen thousand, three hundred twenty-nine".