428338309 has 16 divisors (see below), whose sum is σ = 495024768. Its totient is φ = 363048192.

The previous prime is 428338301. The next prime is 428338327. The reversal of 428338309 is 903833824.

It is a cyclic number.

It is not a de Polignac number, because 428338309 - 2³ = 428338301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428338301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299454 + ... + 300880.

It is an arithmetic number, because the mean of its divisors is an integer number (30939048).

Almost surely, 2^428338309 is an apocalyptic number.

It is an amenable number.

428338309 is a deficient number, since it is larger than the sum of its proper divisors (66686459).

428338309 is a wasteful number, since it uses less digits than its factorization.

428338309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1884.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 428338309 is about 20696.3356418473. The cubic root of 428338309 is about 753.8107141876.

The spelling of 428338309 in words is "four hundred twenty-eight million, three hundred thirty-eight thousand, three hundred nine".