428581389 has 8 divisors (see below), whose sum is σ = 571893760. Its totient is φ = 285494976.

The previous prime is 428581367. The next prime is 428581409. The reversal of 428581389 is 983185824.

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

It is not a de Polignac number, because 428581389 - 2⁷ = 428581261 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 (428581319) 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, 52012 + ... + 59685.

It is an arithmetic number, because the mean of its divisors is an integer number (71486720).

Almost surely, 2^428581389 is an apocalyptic number.

It is an amenable number.

428581389 is a deficient number, since it is larger than the sum of its proper divisors (143312371).

428581389 is a wasteful number, since it uses less digits than its factorization.

428581389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112979.

The product of its digits is 552960, while the sum is 48.

The square root of 428581389 is about 20702.2073460779. The cubic root of 428581389 is about 753.9532819147.

The spelling of 428581389 in words is "four hundred twenty-eight million, five hundred eighty-one thousand, three hundred eighty-nine".