428631589 has 8 divisors (see below), whose sum is σ = 440008128. Its totient is φ = 417299040.

The previous prime is 428631563. The next prime is 428631601. The reversal of 428631589 is 985136824.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428631589 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 (428631529) 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, 9234 + ... + 30700.

It is an arithmetic number, because the mean of its divisors is an integer number (55001016).

Almost surely, 2^428631589 is an apocalyptic number.

It is an amenable number.

428631589 is a deficient number, since it is larger than the sum of its proper divisors (11376539).

428631589 is a wasteful number, since it uses less digits than its factorization.

428631589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21995.

The product of its digits is 414720, while the sum is 46.

The square root of 428631589 is about 20703.4197416755. The cubic root of 428631589 is about 753.9827177684.

The spelling of 428631589 in words is "four hundred twenty-eight million, six hundred thirty-one thousand, five hundred eighty-nine".