506421686 has 8 divisors (see below), whose sum is σ = 764663664. Its totient is φ = 251533800.

The previous prime is 506421677. The next prime is 506421737. The reversal of 506421686 is 686124605.

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 838145 + ... + 838748.

It is an arithmetic number, because the mean of its divisors is an integer number (95582958).

Almost surely, 2^506421686 is an apocalyptic number.

506421686 is a deficient number, since it is larger than the sum of its proper divisors (258241978).

506421686 is a wasteful number, since it uses less digits than its factorization.

506421686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1677046.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 506421686 is about 22503.8149210306. The cubic root of 506421686 is about 797.0840123086.

The spelling of 506421686 in words is "five hundred six million, four hundred twenty-one thousand, six hundred eighty-six".