647696 has 20 divisors (see below), whose sum is σ = 1434432. Its totient is φ = 277536.

The previous prime is 647693. The next prime is 647719. The reversal of 647696 is 696746.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 647696.

It is not an unprimeable number, because it can be changed into a prime (647693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2780 + ... + 3003.

2⁶⁴⁷⁶⁹⁶ is an apocalyptic number.

It is an amenable number.

647696 is an abundant number, since it is smaller than the sum of its proper divisors (786736).

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

647696 is a wasteful number, since it uses less digits than its factorization.

647696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5798 (or 5792 counting only the distinct ones).

The product of its digits is 54432, while the sum is 38.

The square root of 647696 is about 804.7956262307. The cubic root of 647696 is about 86.5214398836.

The spelling of 647696 in words is "six hundred forty-seven thousand, six hundred ninety-six".