181028156 has 12 divisors (see below), whose sum is σ = 316894368. Its totient is φ = 90486912.

The previous prime is 181028149. The next prime is 181028201. The reversal of 181028156 is 651820181.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 19565 + ... + 27291.

It is an arithmetic number, because the mean of its divisors is an integer number (26407864).

Almost surely, 2^181028156 is an apocalyptic number.

It is an amenable number.

181028156 is a deficient number, since it is larger than the sum of its proper divisors (135866212).

181028156 is a wasteful number, since it uses less digits than its factorization.

181028156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13588 (or 13586 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 32.

The square root of 181028156 is about 13454.6704158816. The cubic root of 181028156 is about 565.6946123169.

The spelling of 181028156 in words is "one hundred eighty-one million, twenty-eight thousand, one hundred fifty-six".