205698130 has 64 divisors (see below), whose sum is σ = 430261632. Its totient is φ = 69975040.

The previous prime is 205698127. The next prime is 205698139. The reversal of 205698130 is 31896502.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (205698139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 592617 + ... + 592963.

It is an arithmetic number, because the mean of its divisors is an integer number (6722838).

Almost surely, 2^205698130 is an apocalyptic number.

205698130 is an abundant number, since it is smaller than the sum of its proper divisors (224563502).

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

205698130 is a wasteful number, since it uses less digits than its factorization.

205698130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 205698130 is about 14342.1800992736. The cubic root of 205698130 is about 590.3054341168.

The spelling of 205698130 in words is "two hundred five million, six hundred ninety-eight thousand, one hundred thirty".