647431648 has 12 divisors (see below), whose sum is σ = 1274631120. Its totient is φ = 323715808.

The previous prime is 647431639. The next prime is 647431679. The reversal of 647431648 is 846134746.

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, 10116088 + ... + 10116151.

It is an arithmetic number, because the mean of its divisors is an integer number (106219260).

Almost surely, 2^647431648 is an apocalyptic number.

It is an amenable number.

647431648 is a deficient number, since it is larger than the sum of its proper divisors (627199472).

647431648 is a wasteful number, since it uses less digits than its factorization.

647431648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20232249 (or 20232241 counting only the distinct ones).

The product of its digits is 387072, while the sum is 43.

The square root of 647431648 is about 25444.6781862141. The cubic root of 647431648 is about 865.0966726797.

The spelling of 647431648 in words is "six hundred forty-seven million, four hundred thirty-one thousand, six hundred forty-eight".