161886 has 8 divisors (see below), whose sum is σ = 323784. Its totient is φ = 53960.

The previous prime is 161881. The next prime is 161911. The reversal of 161886 is 688161.

It is a sphenic number, since it is the product of 3 distinct primes.

161886 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161881) by changing a digit.

161886 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13485 + ... + 13496.

It is an arithmetic number, because the mean of its divisors is an integer number (40473).

2¹⁶¹⁸⁸⁶ is an apocalyptic number.

161886 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

161886 is a wasteful number, since it uses less digits than its factorization.

161886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26986.

The product of its digits is 2304, while the sum is 30.

The square root of 161886 is about 402.3505933884. The cubic root of 161886 is about 54.5008276394.

The spelling of 161886 in words is "one hundred sixty-one thousand, eight hundred eighty-six".