428404259 has 4 divisors (see below), whose sum is σ = 433217880. Its totient is φ = 423590640.

The previous prime is 428404253. The next prime is 428404271. The reversal of 428404259 is 952404824.

It is a happy number.

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 428404259 - 2⁴ = 428404243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428404253) 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, 2406677 + ... + 2406854.

It is an arithmetic number, because the mean of its divisors is an integer number (108304470).

Almost surely, 2^428404259 is an apocalyptic number.

428404259 is a deficient number, since it is larger than the sum of its proper divisors (4813621).

428404259 is an equidigital number, since it uses as much as digits as its factorization.

428404259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4813620.

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 428404259 is about 20697.9288577384. The cubic root of 428404259 is about 753.8493995479.

The spelling of 428404259 in words is "four hundred twenty-eight million, four hundred four thousand, two hundred fifty-nine".