181828190 has 32 divisors (see below), whose sum is σ = 334773216. Its totient is φ = 71084160.

The previous prime is 181828189. The next prime is 181828193. The reversal of 181828190 is 91828181.

It is a happy number.

It is a super-2 number, since 2×181828190² = 66122981357352200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181828193) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 104669 + ... + 106391.

It is an arithmetic number, because the mean of its divisors is an integer number (10461663).

Almost surely, 2^181828190 is an apocalyptic number.

181828190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

181828190 is a deficient number, since it is larger than the sum of its proper divisors (152945026).

181828190 is a wasteful number, since it uses less digits than its factorization.

181828190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1964.

The product of its (nonzero) digits is 9216, while the sum is 38.

The square root of 181828190 is about 13484.3683574723. The cubic root of 181828190 is about 566.5267293825.

Subtracting from 181828190 its reverse (91828181), we obtain a palindrome (90000009).

The spelling of 181828190 in words is "one hundred eighty-one million, eight hundred twenty-eight thousand, one hundred ninety".