428125289 has 8 divisors (see below), whose sum is σ = 462144960. Its totient is φ = 395389456.

The previous prime is 428125279. The next prime is 428125343. The reversal of 428125289 is 982521824.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 428125289 - 2²⁴ = 411348073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (428125259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320267 + ... + 321600.

It is an arithmetic number, because the mean of its divisors is an integer number (57768120).

Almost surely, 2^428125289 is an apocalyptic number.

It is an amenable number.

428125289 is a deficient number, since it is larger than the sum of its proper divisors (34019671).

428125289 is a wasteful number, since it uses less digits than its factorization.

428125289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641919.

The product of its digits is 92160, while the sum is 41.

The square root of 428125289 is about 20691.1886802088. The cubic root of 428125289 is about 753.6857324606.

The spelling of 428125289 in words is "four hundred twenty-eight million, one hundred twenty-five thousand, two hundred eighty-nine".