646442682 has 8 divisors (see below), whose sum is σ = 1292885376. Its totient is φ = 215480892.

The previous prime is 646442647. The next prime is 646442711. The reversal of 646442682 is 286244646.

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

646442682 is an admirable number.

It is a super-2 number, since 2×646442682² = 835776282222706248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53870218 + ... + 53870229.

It is an arithmetic number, because the mean of its divisors is an integer number (161610672).

Almost surely, 2^646442682 is an apocalyptic number.

646442682 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646442682 is a wasteful number, since it uses less digits than its factorization.

646442682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107740452.

The product of its digits is 442368, while the sum is 42.

The square root of 646442682 is about 25425.2371080389. The cubic root of 646442682 is about 864.6559635108.

The spelling of 646442682 in words is "six hundred forty-six million, four hundred forty-two thousand, six hundred eighty-two".