428089879 has 8 divisors (see below), whose sum is σ = 489806720. Its totient is φ = 366513336.

The previous prime is 428089873. The next prime is 428089891. The reversal of 428089879 is 978980824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 428089879 - 2¹⁵ = 428057111 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 (428089873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28449 + ... + 40810.

It is an arithmetic number, because the mean of its divisors is an integer number (61225840).

Almost surely, 2^428089879 is an apocalyptic number.

428089879 is a deficient number, since it is larger than the sum of its proper divisors (61716841).

428089879 is an equidigital number, since it uses as much as digits as its factorization.

428089879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70149.

The product of its (nonzero) digits is 2322432, while the sum is 55.

The square root of 428089879 is about 20690.3329842707. The cubic root of 428089879 is about 753.6649529144.

The spelling of 428089879 in words is "four hundred twenty-eight million, eighty-nine thousand, eight hundred seventy-nine".