428612686 has 8 divisors (see below), whose sum is σ = 643047264. Its totient is φ = 214263600.

The previous prime is 428612677. The next prime is 428612719. The reversal of 428612686 is 686216824.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6870 + ... + 30073.

It is an arithmetic number, because the mean of its divisors is an integer number (80380908).

Almost surely, 2^428612686 is an apocalyptic number.

428612686 is a deficient number, since it is larger than the sum of its proper divisors (214434578).

428612686 is a wasteful number, since it uses less digits than its factorization.

428612686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42746.

The product of its digits is 221184, while the sum is 43.

The square root of 428612686 is about 20702.9632178585. The cubic root of 428612686 is about 753.9716338561.

The spelling of 428612686 in words is "four hundred twenty-eight million, six hundred twelve thousand, six hundred eighty-six".