209979230 has 32 divisors (see below), whose sum is σ = 385689600. Its totient is φ = 82284832.

The previous prime is 209979229. The next prime is 209979247. The reversal of 209979230 is 32979902.

It is a congruent number.

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, 282239 + ... + 282981.

It is an arithmetic number, because the mean of its divisors is an integer number (12052800).

Almost surely, 2^209979230 is an apocalyptic number.

209979230 is a deficient number, since it is larger than the sum of its proper divisors (175710370).

209979230 is a wasteful number, since it uses less digits than its factorization.

209979230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 209979230 is about 14490.6600953856. The cubic root of 209979230 is about 594.3725985574.

The spelling of 209979230 in words is "two hundred nine million, nine hundred seventy-nine thousand, two hundred thirty".