181983772 has 12 divisors (see below), whose sum is σ = 318576496. Its totient is φ = 90961920.

The previous prime is 181983731. The next prime is 181983779. The reversal of 181983772 is 277389181.

181983772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181983779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11548 + ... + 22300.

Almost surely, 2^181983772 is an apocalyptic number.

It is an amenable number.

181983772 is a deficient number, since it is larger than the sum of its proper divisors (136592724).

181983772 is a wasteful number, since it uses less digits than its factorization.

181983772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14988 (or 14986 counting only the distinct ones).

The product of its digits is 169344, while the sum is 46.

The square root of 181983772 is about 13490.1361001289. The cubic root of 181983772 is about 566.6882669198.

The spelling of 181983772 in words is "one hundred eighty-one million, nine hundred eighty-three thousand, seven hundred seventy-two".