181490326 has 16 divisors (see below), whose sum is σ = 275977728. Its totient is φ = 89505000.

The previous prime is 181490219. The next prime is 181490327. The reversal of 181490326 is 623094181.

It is a junction number, because it is equal to n+sod(n) for n = 181490291 and 181490300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181490327) 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, 54201 + ... + 57451.

It is an arithmetic number, because the mean of its divisors is an integer number (17248608).

Almost surely, 2^181490326 is an apocalyptic number.

181490326 is a deficient number, since it is larger than the sum of its proper divisors (94487402).

181490326 is a wasteful number, since it uses less digits than its factorization.

181490326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3627.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 181490326 is about 13471.8345447085. The cubic root of 181490326 is about 566.1756146572.

The spelling of 181490326 in words is "one hundred eighty-one million, four hundred ninety thousand, three hundred twenty-six".