647227472 has 10 divisors (see below), whose sum is σ = 1254003258. Its totient is φ = 323613728.

The previous prime is 647227439. The next prime is 647227513. The reversal of 647227472 is 274722746.

It can be written as a sum of positive squares in only one way, i.e., 602015296 + 45212176 = 24536^2 + 6724^2 .

It is a congruent number.

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 as a sum of consecutive naturals, namely, 20225843 + ... + 20225874.

Almost surely, 2^647227472 is an apocalyptic number.

It is an amenable number.

647227472 is a deficient number, since it is larger than the sum of its proper divisors (606775786).

647227472 is a wasteful number, since it uses less digits than its factorization.

647227472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40451725 (or 40451719 counting only the distinct ones).

The product of its digits is 263424, while the sum is 41.

The square root of 647227472 is about 25440.6657145602. The cubic root of 647227472 is about 865.0057232851.

The spelling of 647227472 in words is "six hundred forty-seven million, two hundred twenty-seven thousand, four hundred seventy-two".