10728509 has 8 divisors (see below), whose sum is σ = 11879328. Its totient is φ = 9606960.

The previous prime is 10728503. The next prime is 10728517. The reversal of 10728509 is 90582701.

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

It is not a de Polignac number, because 10728509 - 2¹⁶ = 10662973 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 (10728503) 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, 6542 + ... + 8015.

It is an arithmetic number, because the mean of its divisors is an integer number (1484916).

Almost surely, 2^10728509 is an apocalyptic number.

It is an amenable number.

10728509 is a deficient number, since it is larger than the sum of its proper divisors (1150819).

10728509 is a wasteful number, since it uses less digits than its factorization.

10728509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14635.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 10728509 is about 3275.4402757492. The cubic root of 10728509 is about 220.5530780982.

The spelling of 10728509 in words is "ten million, seven hundred twenty-eight thousand, five hundred nine".