647935008 has 192 divisors, whose sum is σ = 2107607040. Its totient is φ = 170053632.

The previous prime is 647934977. The next prime is 647935019. The reversal of 647935008 is 800539746.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 in 31 ways as a sum of consecutive naturals, for example, 490573 + ... + 491891.

It is an arithmetic number, because the mean of its divisors is an integer number (10977120).

Almost surely, 2^647935008 is an apocalyptic number.

647935008 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647935008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1053803520).

647935008 is an abundant number, since it is smaller than the sum of its proper divisors (1459672032).

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

647935008 is a wasteful number, since it uses less digits than its factorization.

647935008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399 (or 1391 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 647935008 is about 25454.5675272632. The cubic root of 647935008 is about 865.3208107591.

The spelling of 647935008 in words is "six hundred forty-seven million, nine hundred thirty-five thousand, eight".