647530 has 32 divisors (see below), whose sum is σ = 1333584. Its totient is φ = 224256.

The previous prime is 647527. The next prime is 647531. The reversal of 647530 is 35746.

647530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 423801 + 223729 = 651^2 + 473^2 .

It is a junction number, because it is equal to n+sod(n) for n = 647495 and 647504.

It is not an unprimeable number, because it can be changed into a prime (647531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2064 + ... + 2356.

2⁶⁴⁷⁵³⁰ is an apocalyptic number.

647530 is an abundant number, since it is smaller than the sum of its proper divisors (686054).

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

647530 is a wasteful number, since it uses less digits than its factorization.

647530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 647530 is about 804.6924878486. The cubic root of 647530 is about 86.5140476367.

The spelling of 647530 in words is "six hundred forty-seven thousand, five hundred thirty".