181008490 has 16 divisors (see below), whose sum is σ = 350878248. Its totient is φ = 66833856.

The previous prime is 181008449. The next prime is 181008491. The reversal of 181008490 is 94800181.

It can be written as a sum of positive squares in 4 ways, for example, as 136212241 + 44796249 = 11671^2 + 6693^2 .

It is not an unprimeable number, because it can be changed into a prime (181008491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 696057 + ... + 696316.

Almost surely, 2^181008490 is an apocalyptic number.

181008490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

181008490 is a deficient number, since it is larger than the sum of its proper divisors (169869758).

181008490 is a wasteful number, since it uses less digits than its factorization.

181008490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392393.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 181008490 is about 13453.9395717388. The cubic root of 181008490 is about 565.6741268238.

The spelling of 181008490 in words is "one hundred eighty-one million, eight thousand, four hundred ninety".