647041632 has 96 divisors (see below), whose sum is σ = 1737695232. Its totient is φ = 210760704.

The previous prime is 647041627. The next prime is 647041643. The reversal of 647041632 is 236140746.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 647041593 and 647041602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 889653 + ... + 890379.

It is an arithmetic number, because the mean of its divisors is an integer number (18100992).

Almost surely, 2^647041632 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 647041632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (868847616).

647041632 is an abundant number, since it is smaller than the sum of its proper divisors (1090653600).

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

647041632 is a wasteful number, since it uses less digits than its factorization.

647041632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940 (or 932 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 647041632 is about 25437.0130321939. The cubic root of 647041632 is about 864.9229249600.

The spelling of 647041632 in words is "six hundred forty-seven million, forty-one thousand, six hundred thirty-two".