209080830 has 32 divisors (see below), whose sum is σ = 573479424. Its totient is φ = 47789856.

The previous prime is 209080819. The next prime is 209080831. The reversal of 209080830 is 38080902.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209080831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 497602 + ... + 498021.

It is an arithmetic number, because the mean of its divisors is an integer number (17921232).

Almost surely, 2^209080830 is an apocalyptic number.

209080830 is an abundant number, since it is smaller than the sum of its proper divisors (364398594).

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

209080830 is a wasteful number, since it uses less digits than its factorization.

209080830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995640.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 209080830 is about 14459.6275885653. The cubic root of 209080830 is about 593.5237087063.

The spelling of 209080830 in words is "two hundred nine million, eighty thousand, eight hundred thirty".