209952238 has 16 divisors (see below), whose sum is σ = 317256480. Its totient is φ = 104203296.

The previous prime is 209952229. The next prime is 209952263. The reversal of 209952238 is 832259902.

It is a self number, because there is not a number n which added to its sum of digits gives 209952238.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254695 + ... + 255517.

It is an arithmetic number, because the mean of its divisors is an integer number (19828530).

Almost surely, 2^209952238 is an apocalyptic number.

209952238 is a deficient number, since it is larger than the sum of its proper divisors (107304242).

209952238 is a wasteful number, since it uses less digits than its factorization.

209952238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 209952238 is about 14489.7287069151. The cubic root of 209952238 is about 594.3471293833.

The spelling of 209952238 in words is "two hundred nine million, nine hundred fifty-two thousand, two hundred thirty-eight".