181996832 has 48 divisors (see below), whose sum is σ = 383405400. Its totient is φ = 84738048.

The previous prime is 181996823. The next prime is 181996853. The reversal of 181996832 is 238699181.

It can be written as a sum of positive squares in 4 ways, for example, as 119333776 + 62663056 = 10924^2 + 7916^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51044 + ... + 54492.

Almost surely, 2^181996832 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 181996832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191702700).

181996832 is an abundant number, since it is smaller than the sum of its proper divisors (201408568).

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

181996832 is a wasteful number, since it uses less digits than its factorization.

181996832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3573 (or 3565 counting only the distinct ones).

The product of its digits is 186624, while the sum is 47.

The square root of 181996832 is about 13490.6201488293. The cubic root of 181996832 is about 566.7018226555.

The spelling of 181996832 in words is "one hundred eighty-one million, nine hundred ninety-six thousand, eight hundred thirty-two".