647381682 has 24 divisors (see below), whose sum is σ = 1403311104. Its totient is φ = 215693784.

The previous prime is 647381663. The next prime is 647381701. The reversal of 647381682 is 286183746.

It is an interprime number because it is at equal distance from previous prime (647381663) and next prime (647381701).

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 11 ways as a sum of consecutive naturals, for example, 38703 + ... + 52845.

It is an arithmetic number, because the mean of its divisors is an integer number (58471296).

Almost surely, 2^647381682 is an apocalyptic number.

647381682 is an abundant number, since it is smaller than the sum of its proper divisors (755929422).

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

647381682 is a wasteful number, since it uses less digits than its factorization.

647381682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16694 (or 16691 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 647381682 is about 25443.6963116604. The cubic root of 647381682 is about 865.0744172892.

The spelling of 647381682 in words is "six hundred forty-seven million, three hundred eighty-one thousand, six hundred eighty-two".