181930 has 32 divisors (see below), whose sum is σ = 393984. Its totient is φ = 59136.

The previous prime is 181927. The next prime is 181931. The reversal of 181930 is 39181.

181930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

181930 is a Rhonda number in base 8.

It is not an unprimeable number, because it can be changed into a prime (181931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1554 + ... + 1666.

It is an arithmetic number, because the mean of its divisors is an integer number (12312).

2¹⁸¹⁹³⁰ is an apocalyptic number.

181930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

181930 is an abundant number, since it is smaller than the sum of its proper divisors (212054).

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

181930 is a wasteful number, since it uses less digits than its factorization.

181930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 181930 is about 426.5325309985. The cubic root of 181930 is about 56.6632446992.

It can be divided in two parts, 1819 and 30, that added together give a square (1849 = 43²).

The spelling of 181930 in words is "one hundred eighty-one thousand, nine hundred thirty".