209930346 has 32 divisors (see below), whose sum is σ = 468952320. Its totient is φ = 69610752.

The previous prime is 209930321. The next prime is 209930351. The reversal of 209930346 is 643039902.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 209930346.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 351 + ... + 20493.

It is an arithmetic number, because the mean of its divisors is an integer number (14654760).

Almost surely, 2^209930346 is an apocalyptic number.

209930346 is an abundant number, since it is smaller than the sum of its proper divisors (259021974).

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

209930346 is a wasteful number, since it uses less digits than its factorization.

209930346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20347 (or 20341 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 209930346 is about 14488.9732555485. The cubic root of 209930346 is about 594.3264708759.

It can be divided in two parts, 209930 and 346, that added together give a triangular number (210276 = T₆₄₈).

The spelling of 209930346 in words is "two hundred nine million, nine hundred thirty thousand, three hundred forty-six".