209448330 has 128 divisors (see below), whose sum is σ = 655216128. Its totient is φ = 41582592.

The previous prime is 209448301. The next prime is 209448359. The reversal of 209448330 is 33844902.

It is an interprime number because it is at equal distance from previous prime (209448301) and next prime (209448359).

It is a junction number, because it is equal to n+sod(n) for n = 209448291 and 209448300.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 44154 + ... + 48666.

It is an arithmetic number, because the mean of its divisors is an integer number (5118876).

Almost surely, 2^209448330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209448330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327608064).

209448330 is an abundant number, since it is smaller than the sum of its proper divisors (445767798).

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

209448330 is a wasteful number, since it uses less digits than its factorization.

209448330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4560.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 209448330 is about 14472.3298055289. The cubic root of 209448330 is about 593.8712494024.

The spelling of 209448330 in words is "two hundred nine million, four hundred forty-eight thousand, three hundred thirty".