181997360 has 40 divisors (see below), whose sum is σ = 433472256. Its totient is φ = 71022080.

The previous prime is 181997357. The next prime is 181997369. The reversal of 181997360 is 63799181.

181997360 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (181997369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24464 + ... + 31023.

Almost surely, 2^181997360 is an apocalyptic number.

181997360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181997360 is an abundant number, since it is smaller than the sum of its proper divisors (251474896).

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

181997360 is a wasteful number, since it uses less digits than its factorization.

181997360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55541 (or 55535 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 181997360 is about 13490.6397179674. The cubic root of 181997360 is about 566.7023706838.

The spelling of 181997360 in words is "one hundred eighty-one million, nine hundred ninety-seven thousand, three hundred sixty".