428328289 has 16 divisors (see below), whose sum is σ = 455083200. Its totient is φ = 402446016.

The previous prime is 428328247. The next prime is 428328301. The reversal of 428328289 is 982823824.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 428328289 - 2⁹ = 428327777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428322289) 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, 484642 + ... + 485524.

It is an arithmetic number, because the mean of its divisors is an integer number (28442700).

Almost surely, 2^428328289 is an apocalyptic number.

It is an amenable number.

428328289 is a deficient number, since it is larger than the sum of its proper divisors (26754911).

428328289 is a wasteful number, since it uses less digits than its factorization.

428328289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344.

The product of its digits is 442368, while the sum is 46.

The square root of 428328289 is about 20696.0935685941. The cubic root of 428328289 is about 753.8048362464.

The spelling of 428328289 in words is "four hundred twenty-eight million, three hundred twenty-eight thousand, two hundred eighty-nine".