28728007 has 8 divisors (see below), whose sum is σ = 35816832. Its totient is φ = 22385400.

The previous prime is 28728001. The next prime is 28728013. The reversal of 28728007 is 70082782.

It is an interprime number because it is at equal distance from previous prime (28728001) and next prime (28728013).

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 28728007 - 2⁷ = 28727879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28728001) 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, 186469 + ... + 186622.

It is an arithmetic number, because the mean of its divisors is an integer number (4477104).

Almost surely, 2^28728007 is an apocalyptic number.

28728007 is a deficient number, since it is larger than the sum of its proper divisors (7088825).

28728007 is a wasteful number, since it uses less digits than its factorization.

28728007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373109.

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 28728007 is about 5359.8513971938. The cubic root of 28728007 is about 306.2681481957.

The spelling of 28728007 in words is "twenty-eight million, seven hundred twenty-eight thousand, seven".