181485434 has 16 divisors (see below), whose sum is σ = 300321000. Its totient is φ = 81719040.

The previous prime is 181485389. The next prime is 181485449. The reversal of 181485434 is 434584181.

It can be written as a sum of positive squares in 4 ways, for example, as 35438209 + 146047225 = 5953^2 + 12085^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84059 + ... + 86190.

Almost surely, 2^181485434 is an apocalyptic number.

181485434 is a deficient number, since it is larger than the sum of its proper divisors (118835566).

181485434 is a wasteful number, since it uses less digits than its factorization.

181485434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170305.

The product of its digits is 61440, while the sum is 38.

The square root of 181485434 is about 13471.6529794974. The cubic root of 181485434 is about 566.1705275982.

The spelling of 181485434 in words is "one hundred eighty-one million, four hundred eighty-five thousand, four hundred thirty-four".