10028309 has 4 divisors (see below), whose sum is σ = 10149216. Its totient is φ = 9907404.

The previous prime is 10028297. The next prime is 10028321. The reversal of 10028309 is 90382001.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90382001 = 43 ⋅2101907.

It is an interprime number because it is at equal distance from previous prime (10028297) and next prime (10028321).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10028309 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 (10028329) 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, 60329 + ... + 60494.

It is an arithmetic number, because the mean of its divisors is an integer number (2537304).

Almost surely, 2^10028309 is an apocalyptic number.

It is an amenable number.

10028309 is a deficient number, since it is larger than the sum of its proper divisors (120907).

10028309 is an equidigital number, since it uses as much as digits as its factorization.

10028309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120906.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 10028309 is about 3166.7505427488. The cubic root of 10028309 is about 215.6465771028.

The spelling of 10028309 in words is "ten million, twenty-eight thousand, three hundred nine".