209460216 has 64 divisors (see below), whose sum is σ = 602208000. Its totient is φ = 59470848.

The previous prime is 209460203. The next prime is 209460221. The reversal of 209460216 is 612064902.

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, 23560 + ... + 31208.

It is an arithmetic number, because the mean of its divisors is an integer number (9409500).

Almost surely, 2^209460216 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 209460216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301104000).

209460216 is an abundant number, since it is smaller than the sum of its proper divisors (392747784).

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

209460216 is a wasteful number, since it uses less digits than its factorization.

209460216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7828 (or 7824 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 209460216 is about 14472.7404454029. The cubic root of 209460216 is about 593.8824830722.

The spelling of 209460216 in words is "two hundred nine million, four hundred sixty thousand, two hundred sixteen".