28129337 has 8 divisors (see below), whose sum is σ = 28596672. Its totient is φ = 27666000.

The previous prime is 28129301. The next prime is 28129393. The reversal of 28129337 is 73392182.

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 28129337 - 2¹⁰ = 28128313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28129297 and 28129306.

It is not an unprimeable number, because it can be changed into a prime (28129397) 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, 15287 + ... + 17027.

It is an arithmetic number, because the mean of its divisors is an integer number (3574584).

Almost surely, 2^28129337 is an apocalyptic number.

It is an amenable number.

28129337 is a deficient number, since it is larger than the sum of its proper divisors (467335).

28129337 is a wasteful number, since it uses less digits than its factorization.

28129337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999.

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

The square root of 28129337 is about 5303.7097394182. The cubic root of 28129337 is about 304.1257306849.

The spelling of 28129337 in words is "twenty-eight million, one hundred twenty-nine thousand, three hundred thirty-seven".