181940992 has 36 divisors (see below), whose sum is σ = 365855560. Its totient is φ = 90298368.

The previous prime is 181940963. The next prime is 181941031. The reversal of 181940992 is 299049181.

It is a happy 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, 33028 + ... + 38140.

Almost surely, 2^181940992 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 181940992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182927780).

181940992 is an abundant number, since it is smaller than the sum of its proper divisors (183914568).

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

181940992 is an equidigital number, since it uses as much as digits as its factorization.

181940992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5268 (or 5254 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 181940992 is about 13488.5504039537. The cubic root of 181940992 is about 566.6438585207.

The spelling of 181940992 in words is "one hundred eighty-one million, nine hundred forty thousand, nine hundred ninety-two".