181486368 has 72 divisors (see below), whose sum is σ = 589837248. Its totient is φ = 51852672.

The previous prime is 181486367. The next prime is 181486381. The reversal of 181486368 is 863684181.

It is a happy number.

181486368 is a `hidden beast` number, since 1 + 8 + 1 + 4 + 8 + 636 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (181486367) 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, 42996 + ... + 47027.

It is an arithmetic number, because the mean of its divisors is an integer number (8192184).

Almost surely, 2^181486368 is an apocalyptic number.

181486368 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

181486368 is an abundant number, since it is smaller than the sum of its proper divisors (408350880).

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

181486368 is a wasteful number, since it uses less digits than its factorization.

181486368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90046 (or 90035 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 181486368 is about 13471.6876448350. The cubic root of 181486368 is about 566.1714988467.

The spelling of 181486368 in words is "one hundred eighty-one million, four hundred eighty-six thousand, three hundred sixty-eight".