161886208 has 52 divisors (see below), whose sum is σ = 353261448. Its totient is φ = 73564160.

The previous prime is 161886203. The next prime is 161886209. The reversal of 161886208 is 802688161.

It is not an unprimeable number, because it can be changed into a prime (161886203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43260 + ... + 46852.

Almost surely, 2^161886208 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 161886208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176630724).

161886208 is an abundant number, since it is smaller than the sum of its proper divisors (191375240).

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

161886208 is an equidigital number, since it uses as much as digits as its factorization.

161886208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3628 (or 3606 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 161886208 is about 12723.4511041620. The cubic root of 161886208 is about 545.0085098130.

The spelling of 161886208 in words is "one hundred sixty-one million, eight hundred eighty-six thousand, two hundred eight".