656530 has 32 divisors (see below), whose sum is σ = 1378944. Its totient is φ = 220416.

The previous prime is 656527. The next prime is 656561. The reversal of 656530 is 35656.

It is a junction number, because it is equal to n+sod(n) for n = 656495 and 656504.

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, 5754 + ... + 5866.

It is an arithmetic number, because the mean of its divisors is an integer number (43092).

2⁶⁵⁶⁵³⁰ is an apocalyptic number.

656530 is an abundant number, since it is smaller than the sum of its proper divisors (722414).

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

656530 is a wasteful number, since it uses less digits than its factorization.

656530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 656530 is about 810.2653886228. The cubic root of 656530 is about 86.9130235707.

The spelling of 656530 in words is "six hundred fifty-six thousand, five hundred thirty".