8181456 has 20 divisors (see below), whose sum is σ = 21135552. Its totient is φ = 2727136.

The previous prime is 8181449. The next prime is 8181499. The reversal of 8181456 is 6541818.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 85176 + ... + 85271.

Almost surely, 2^8181456 is an apocalyptic number.

It is an amenable number.

8181456 is an abundant number, since it is smaller than the sum of its proper divisors (12954096).

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

8181456 is a wasteful number, since it uses less digits than its factorization.

8181456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170458 (or 170452 counting only the distinct ones).

The product of its digits is 7680, while the sum is 33.

The square root of 8181456 is about 2860.3244571202. The cubic root of 8181456 is about 201.5008425196.

The spelling of 8181456 in words is "eight million, one hundred eighty-one thousand, four hundred fifty-six".