209740960 has 192 divisors, whose sum is σ = 594397440. Its totient is φ = 68935680.

The previous prime is 209740957. The next prime is 209741003. The reversal of 209740960 is 69047902.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2036269 + ... + 2036371.

It is an arithmetic number, because the mean of its divisors is an integer number (3095820).

Almost surely, 2^209740960 is an apocalyptic number.

209740960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209740960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297198720).

209740960 is an abundant number, since it is smaller than the sum of its proper divisors (384656480).

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

209740960 is a wasteful number, since it uses less digits than its factorization.

209740960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 209740960 is about 14482.4362591382. The cubic root of 209740960 is about 594.1476957417.

The spelling of 209740960 in words is "two hundred nine million, seven hundred forty thousand, nine hundred sixty".