10428209 has 4 divisors (see below), whose sum is σ = 11376240. Its totient is φ = 9480180.

The previous prime is 10428199. The next prime is 10428239. The reversal of 10428209 is 90282401.

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.

It is a cyclic number.

It is not a de Polignac number, because 10428209 - 2⁴ = 10428193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10428239) 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, 473999 + ... + 474020.

It is an arithmetic number, because the mean of its divisors is an integer number (2844060).

Almost surely, 2^10428209 is an apocalyptic number.

It is an amenable number.

10428209 is a deficient number, since it is larger than the sum of its proper divisors (948031).

10428209 is an equidigital number, since it uses as much as digits as its factorization.

10428209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948030.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 10428209 is about 3229.2737573640. The cubic root of 10428209 is about 218.4757516637.

The spelling of 10428209 in words is "ten million, four hundred twenty-eight thousand, two hundred nine".