161844 has 12 divisors (see below), whose sum is σ = 377664. Its totient is φ = 53944.

The previous prime is 161839. The next prime is 161869. The reversal of 161844 is 448161.

161844 = T₁₂₅ + T₁₂₆ + ... + T₁₄₂.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6732 + ... + 6755.

It is an arithmetic number, because the mean of its divisors is an integer number (31472).

2¹⁶¹⁸⁴⁴ is an apocalyptic number.

It is an amenable number.

161844 is an abundant number, since it is smaller than the sum of its proper divisors (215820).

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

161844 is a wasteful number, since it uses less digits than its factorization.

161844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13494 (or 13492 counting only the distinct ones).

The product of its digits is 768, while the sum is 24.

The square root of 161844 is about 402.2983967157. The cubic root of 161844 is about 54.4961139670.

The spelling of 161844 in words is "one hundred sixty-one thousand, eight hundred forty-four".