647667044 has 12 divisors (see below), whose sum is σ = 1135081584. Its totient is φ = 323358024.

The previous prime is 647667019. The next prime is 647667047. The reversal of 647667044 is 440766746.

647667044 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 647666986 and 647667004.

It is not an unprimeable number, because it can be changed into a prime (647667047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115802 + ... + 121265.

It is an arithmetic number, because the mean of its divisors is an integer number (94590132).

Almost surely, 2^647667044 is an apocalyptic number.

It is an amenable number.

647667044 is a deficient number, since it is larger than the sum of its proper divisors (487414540).

647667044 is a wasteful number, since it uses less digits than its factorization.

647667044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237754 (or 237752 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 44.

The square root of 647667044 is about 25449.3034089344. The cubic root of 647667044 is about 865.2015051727.

The spelling of 647667044 in words is "six hundred forty-seven million, six hundred sixty-seven thousand, forty-four".