205530630 has 64 divisors (see below), whose sum is σ = 505612800. Its totient is φ = 53452800.

The previous prime is 205530623. The next prime is 205530631. The reversal of 205530630 is 36035502.

It is a self number, because there is not a number n which added to its sum of digits gives 205530630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205530631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 266886 + ... + 267654.

It is an arithmetic number, because the mean of its divisors is an integer number (7900200).

Almost surely, 2^205530630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205530630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252806400).

205530630 is an abundant number, since it is smaller than the sum of its proper divisors (300082170).

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

205530630 is a wasteful number, since it uses less digits than its factorization.

205530630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989.

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 205530630 is about 14336.3394909579. The cubic root of 205530630 is about 590.1451620219.

The spelling of 205530630 in words is "two hundred five million, five hundred thirty thousand, six hundred thirty".