647677008 has 240 divisors, whose sum is σ = 2086134336. Its totient is φ = 185794560.

The previous prime is 647677003. The next prime is 647677031. The reversal of 647677008 is 800776746.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647677001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2520016 + ... + 2520272.

Almost surely, 2^647677008 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 647677008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1043067168).

647677008 is an abundant number, since it is smaller than the sum of its proper divisors (1438457328).

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

647677008 is a wasteful number, since it uses less digits than its factorization.

647677008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362 (or 353 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The square root of 647677008 is about 25449.4991699247. The cubic root of 647677008 is about 865.2059420325.

The spelling of 647677008 in words is "six hundred forty-seven million, six hundred seventy-seven thousand, eight".