181948836 has 24 divisors (see below), whose sum is σ = 427893760. Its totient is φ = 60171552.

The previous prime is 181948831. The next prime is 181948849. The reversal of 181948836 is 638849181.

181948836 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (181948831) 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, 58171 + ... + 61218.

Almost surely, 2^181948836 is an apocalyptic number.

It is an amenable number.

181948836 is an abundant number, since it is smaller than the sum of its proper divisors (245944924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181948836 is a wasteful number, since it uses less digits than its factorization.

181948836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119523 (or 119521 counting only the distinct ones).

The product of its digits is 331776, while the sum is 48.

The square root of 181948836 is about 13488.8411659416. The cubic root of 181948836 is about 566.6520016197.

The spelling of 181948836 in words is "one hundred eighty-one million, nine hundred forty-eight thousand, eight hundred thirty-six".