181608040 has 16 divisors (see below), whose sum is σ = 408618180. Its totient is φ = 72643200.

The previous prime is 181608001. The next prime is 181608043. The reversal of 181608040 is 40806181.

181608040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 180579844 + 1028196 = 13438^2 + 1014^2 .

It is not an unprimeable number, because it can be changed into a prime (181608043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2270061 + ... + 2270140.

Almost surely, 2^181608040 is an apocalyptic number.

181608040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181608040 is an abundant number, since it is smaller than the sum of its proper divisors (227010140).

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

181608040 is a wasteful number, since it uses less digits than its factorization.

181608040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4540212 (or 4540208 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 181608040 is about 13476.2027292557. The cubic root of 181608040 is about 566.2979947201.

The spelling of 181608040 in words is "one hundred eighty-one million, six hundred eight thousand, forty".