647528 has 32 divisors (see below), whose sum is σ = 1436160. Its totient is φ = 267840.

The previous prime is 647527. The next prime is 647531. The reversal of 647528 is 825746.

It is a junction number, because it is equal to n+sod(n) for n = 647494 and 647503.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 647528.

It is not an unprimeable number, because it can be changed into a prime (647527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1550 + ... + 1922.

It is an arithmetic number, because the mean of its divisors is an integer number (44880).

2⁶⁴⁷⁵²⁸ 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 647528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (718080).

647528 is an abundant number, since it is smaller than the sum of its proper divisors (788632).

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

647528 is a wasteful number, since it uses less digits than its factorization.

647528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417 (or 413 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 647528 is about 804.6912451369. The cubic root of 647528 is about 86.5139585658.

The spelling of 647528 in words is "six hundred forty-seven thousand, five hundred twenty-eight".