647623344 has 60 divisors (see below), whose sum is σ = 1713074136. Its totient is φ = 210825216.

The previous prime is 647623337. The next prime is 647623349. The reversal of 647623344 is 443326746.

647623344 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (647623349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85104 + ... + 92400.

Almost surely, 2^647623344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647623344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (856537068).

647623344 is an abundant number, since it is smaller than the sum of its proper divisors (1065450792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

647623344 is a wasteful number, since it uses less digits than its factorization.

647623344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7394 (or 7345 counting only the distinct ones).

The product of its digits is 290304, while the sum is 39.

The square root of 647623344 is about 25448.4448247825. Note that the first 3 decimals coincide. The cubic root of 647623344 is about 865.1820455051.

The spelling of 647623344 in words is "six hundred forty-seven million, six hundred twenty-three thousand, three hundred forty-four".