647882 has 8 divisors (see below), whose sum is σ = 995652. Its totient is φ = 316000.

The previous prime is 647861. The next prime is 647891. The reversal of 647882 is 288746.

647882 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 625681 + 22201 = 791^2 + 149^2 .

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

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 647882.

It is an unprimeable number.

647882 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3869 + ... + 4032.

2⁶⁴⁷⁸⁸² is an apocalyptic number.

647882 is a deficient number, since it is larger than the sum of its proper divisors (347770).

647882 is a wasteful number, since it uses less digits than its factorization.

647882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7944.

The product of its digits is 21504, while the sum is 35.

The square root of 647882 is about 804.9111752237. The cubic root of 647882 is about 86.5297212623.

The spelling of 647882 in words is "six hundred forty-seven thousand, eight hundred eighty-two".