428686519 has 4 divisors (see below), whose sum is σ = 428728600. Its totient is φ = 428644440.

The previous prime is 428686471. The next prime is 428686523. The reversal of 428686519 is 915686824.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 428686519 - 2¹¹ = 428684471 is a prime.

It is a super-2 number, since 2×428686519² = 367544263144674722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428686019) 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 3 ways as a sum of consecutive naturals, for example, 4909 + ... + 29689.

It is an arithmetic number, because the mean of its divisors is an integer number (107182150).

Almost surely, 2^428686519 is an apocalyptic number.

428686519 is a deficient number, since it is larger than the sum of its proper divisors (42081).

428686519 is a wasteful number, since it uses less digits than its factorization.

428686519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42080.

The product of its digits is 829440, while the sum is 49.

The square root of 428686519 is about 20704.7462916115. The cubic root of 428686519 is about 754.0149245264.

The spelling of 428686519 in words is "four hundred twenty-eight million, six hundred eighty-six thousand, five hundred nineteen".