209061328 has 40 divisors (see below), whose sum is σ = 466488000. Its totient is φ = 88907520.

The previous prime is 209061323. The next prime is 209061341. The reversal of 209061328 is 823160902.

It is a self number, because there is not a number n which added to its sum of digits gives 209061328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209061323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7548 + ... + 21796.

It is an arithmetic number, because the mean of its divisors is an integer number (11662200).

Almost surely, 2^209061328 is an apocalyptic number.

209061328 is a gapful number since it is divisible by the number (28) 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 209061328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233244000).

209061328 is an abundant number, since it is smaller than the sum of its proper divisors (257426672).

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

209061328 is a wasteful number, since it uses less digits than its factorization.

209061328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14395 (or 14389 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 209061328 is about 14458.9532124563. The cubic root of 209061328 is about 593.5052545049.

The spelling of 209061328 in words is "two hundred nine million, sixty-one thousand, three hundred twenty-eight".