428587687 has 12 divisors (see below), whose sum is σ = 483829528. Its totient is φ = 379090800.

The previous prime is 428587669. The next prime is 428587703. The reversal of 428587687 is 786785824.

It is not a de Polignac number, because 428587687 - 2¹¹ = 428585639 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 (428587667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43389 + ... + 52342.

Almost surely, 2^428587687 is an apocalyptic number.

428587687 is a deficient number, since it is larger than the sum of its proper divisors (55241841).

428587687 is a wasteful number, since it uses less digits than its factorization.

428587687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95790 (or 95779 counting only the distinct ones).

The product of its digits is 6021120, while the sum is 55.

The square root of 428587687 is about 20702.3594549027. The cubic root of 428587687 is about 753.9569750091.

The spelling of 428587687 in words is "four hundred twenty-eight million, five hundred eighty-seven thousand, six hundred eighty-seven".