209202930 has 48 divisors (see below), whose sum is σ = 544676184. Its totient is φ = 55710720.

The previous prime is 209202893. The next prime is 209202941. The reversal of 209202930 is 39202902.

It can be written as a sum of positive squares in 4 ways, for example, as 99141849 + 110061081 = 9957^2 + 10491^2 .

It is a junction number, because it is equal to n+sod(n) for n = 209202894 and 209202903.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99490 + ... + 101570.

Almost surely, 2^209202930 is an apocalyptic number.

209202930 is an abundant number, since it is smaller than the sum of its proper divisors (335473254).

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

209202930 is a wasteful number, since it uses less digits than its factorization.

209202930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3211 (or 3208 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 209202930 is about 14463.8490727745. The cubic root of 209202930 is about 593.6392224727.

The spelling of 209202930 in words is "two hundred nine million, two hundred two thousand, nine hundred thirty".