209094912 has 216 divisors, whose sum is σ = 673293600. Its totient is φ = 63977472.

The previous prime is 209094889. The next prime is 209094923. The reversal of 209094912 is 219490902.

It is a tau number, because it is divible by the number of its divisors (216).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 1168039 + ... + 1168217.

It is an arithmetic number, because the mean of its divisors is an integer number (3117100).

Almost surely, 2^209094912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209094912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336646800).

209094912 is an abundant number, since it is smaller than the sum of its proper divisors (464198688).

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

209094912 is a wasteful number, since it uses less digits than its factorization.

209094912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 209094912 is about 14460.1145223681. The cubic root of 209094912 is about 593.5370333987.

The spelling of 209094912 in words is "two hundred nine million, ninety-four thousand, nine hundred twelve".