16181472 has 48 divisors (see below), whose sum is σ = 43076880. Its totient is φ = 5317632.

The previous prime is 16181471. The next prime is 16181479. The reversal of 16181472 is 27418161.

It is a tau number, because it is divible by the number of its divisors (48).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16181471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5854 + ... + 8162.

It is an arithmetic number, because the mean of its divisors is an integer number (897435).

Almost surely, 2^16181472 is an apocalyptic number.

16181472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16181472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21538440).

16181472 is an abundant number, since it is smaller than the sum of its proper divisors (26895408).

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

16181472 is a wasteful number, since it uses less digits than its factorization.

16181472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2395 (or 2387 counting only the distinct ones).

The product of its digits is 2688, while the sum is 30.

The square root of 16181472 is about 4022.6200417141. The cubic root of 16181472 is about 252.9332990855.

It can be divided in two parts, 16181 and 472, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 16181472 in words is "sixteen million, one hundred eighty-one thousand, four hundred seventy-two".