647396 has 12 divisors (see below), whose sum is σ = 1172220. Its totient is φ = 312480.

The previous prime is 647371. The next prime is 647399. The reversal of 647396 is 693746.

It can be written as a sum of positive squares in 2 ways, for example, as 270400 + 376996 = 520^2 + 614^2 .

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 647396.

It is not an unprimeable number, because it can be changed into a prime (647399) by changing a digit.

647396 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, 2675 + ... + 2906.

It is an arithmetic number, because the mean of its divisors is an integer number (97685).

2⁶⁴⁷³⁹⁶ is an apocalyptic number.

It is an amenable number.

647396 is a deficient number, since it is larger than the sum of its proper divisors (524824).

647396 is a wasteful number, since it uses less digits than its factorization.

647396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5614 (or 5612 counting only the distinct ones).

The product of its digits is 27216, while the sum is 35.

The square root of 647396 is about 804.6092219208. The cubic root of 647396 is about 86.5080794797.

It can be divided in two parts, 64 and 7396, that multiplied together give a square (473344 = 688²).

The spelling of 647396 in words is "six hundred forty-seven thousand, three hundred ninety-six".