181794272 has 72 divisors (see below), whose sum is σ = 407219400. Its totient is φ = 79735040.

The previous prime is 181794271. The next prime is 181794317. The reversal of 181794272 is 272497181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181794271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111479 + ... + 113097.

It is an arithmetic number, because the mean of its divisors is an integer number (5655825).

Almost surely, 2^181794272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 181794272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203609700).

181794272 is an abundant number, since it is smaller than the sum of its proper divisors (225425128).

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

181794272 is a wasteful number, since it uses less digits than its factorization.

181794272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680 (or 1661 counting only the distinct ones).

The product of its digits is 56448, while the sum is 41.

The square root of 181794272 is about 13483.1106203279. The cubic root of 181794272 is about 566.4915007994.

The spelling of 181794272 in words is "one hundred eighty-one million, seven hundred ninety-four thousand, two hundred seventy-two".