647052832 has 72 divisors (see below), whose sum is σ = 1344518028. Its totient is φ = 306408960.

The previous prime is 647052821. The next prime is 647052871. The reversal of 647052832 is 238250746.

It can be written as a sum of positive squares in 2 ways, for example, as 621205776 + 25847056 = 24924^2 + 5084^2 .

It is a junction number, because it is equal to n+sod(n) for n = 647052791 and 647052800.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1629658 + ... + 1630054.

Almost surely, 2^647052832 is an apocalyptic number.

647052832 is a gapful number since it is divisible by the number (62) 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 647052832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (672259014).

647052832 is an abundant number, since it is smaller than the sum of its proper divisors (697465196).

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

647052832 is a wasteful number, since it uses less digits than its factorization.

647052832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522 (or 483 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 647052832 is about 25437.2331828758. The cubic root of 647052832 is about 864.9279154070.

The spelling of 647052832 in words is "six hundred forty-seven million, fifty-two thousand, eight hundred thirty-two".