647264 has 24 divisors (see below), whose sum is σ = 1292760. Its totient is φ = 318976.

The previous prime is 647263. The next prime is 647293. The reversal of 647264 is 462746.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 647264.

It is not an unprimeable number, because it can be changed into a prime (647261) 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, 3527 + ... + 3705.

It is an arithmetic number, because the mean of its divisors is an integer number (53865).

2⁶⁴⁷²⁶⁴ is an apocalyptic number.

It is an amenable number.

647264 is a deficient number, since it is larger than the sum of its proper divisors (645496).

647264 is a wasteful number, since it uses less digits than its factorization.

647264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 294 counting only the distinct ones).

The product of its digits is 8064, while the sum is 29.

The square root of 647264 is about 804.5271903423. The cubic root of 647264 is about 86.5021995943.

The spelling of 647264 in words is "six hundred forty-seven thousand, two hundred sixty-four".