647764322 has 12 divisors (see below), whose sum is σ = 981203670. Its totient is φ = 320727168.

The previous prime is 647764319. The next prime is 647764333. The reversal of 647764322 is 223467746.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 647244481 + 519841 = 25441^2 + 721^2 .

It is a super-2 number, since 2×647764322² = 839197233712239368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 647764322.

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 5 ways as a sum of consecutive naturals, for example, 5954 + ... + 36482.

Almost surely, 2^647764322 is an apocalyptic number.

647764322 is a deficient number, since it is larger than the sum of its proper divisors (333439348).

647764322 is a wasteful number, since it uses less digits than its factorization.

647764322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30737 (or 30634 counting only the distinct ones).

The product of its digits is 338688, while the sum is 41.

The square root of 647764322 is about 25451.2145486222. The cubic root of 647764322 is about 865.2448200515.

The spelling of 647764322 in words is "six hundred forty-seven million, seven hundred sixty-four thousand, three hundred twenty-two".