428259239 has 4 divisors (see below), whose sum is σ = 436339656. Its totient is φ = 420178824.

The previous prime is 428259233. The next prime is 428259283. The reversal of 428259239 is 932952824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 428259239 - 2⁸ = 428258983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 428259239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428259233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4040129 + ... + 4040234.

It is an arithmetic number, because the mean of its divisors is an integer number (109084914).

Almost surely, 2^428259239 is an apocalyptic number.

428259239 is a deficient number, since it is larger than the sum of its proper divisors (8080417).

428259239 is an equidigital number, since it uses as much as digits as its factorization.

428259239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8080416.

The product of its digits is 311040, while the sum is 44.

The square root of 428259239 is about 20694.4253121463. The cubic root of 428259239 is about 753.7643275817.

The spelling of 428259239 in words is "four hundred twenty-eight million, two hundred fifty-nine thousand, two hundred thirty-nine".