428987837 has 8 divisors (see below), whose sum is σ = 432394200. Its totient is φ = 425588800.

The previous prime is 428987813. The next prime is 428987849. The reversal of 428987837 is 738789824.

It can be written as a sum of positive squares in 4 ways, for example, as 9803161 + 419184676 = 3131^2 + 20474^2 .

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 428987837 - 2¹⁶ = 428922301 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 (428983837) 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 7 ways as a sum of consecutive naturals, for example, 192743 + ... + 194955.

It is an arithmetic number, because the mean of its divisors is an integer number (54049275).

Almost surely, 2^428987837 is an apocalyptic number.

It is an amenable number.

428987837 is a deficient number, since it is larger than the sum of its proper divisors (3406363).

428987837 is a wasteful number, since it uses less digits than its factorization.

428987837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3663.

The product of its digits is 5419008, while the sum is 56.

The square root of 428987837 is about 20712.0215575400. The cubic root of 428987837 is about 754.1915454745.

The spelling of 428987837 in words is "four hundred twenty-eight million, nine hundred eighty-seven thousand, eight hundred thirty-seven".