81348456 has 64 divisors (see below), whose sum is σ = 233164800. Its totient is φ = 23168448.

The previous prime is 81348439. The next prime is 81348457. The reversal of 81348456 is 65484318.

It is not an unprimeable number, because it can be changed into a prime (81348457) 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 15 ways as a sum of consecutive naturals, for example, 73201 + ... + 74303.

It is an arithmetic number, because the mean of its divisors is an integer number (3643200).

Almost surely, 2^81348456 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 81348456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116582400).

81348456 is an abundant number, since it is smaller than the sum of its proper divisors (151816344).

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

81348456 is a wasteful number, since it uses less digits than its factorization.

81348456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558 (or 1554 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The square root of 81348456 is about 9019.3378914419. The cubic root of 81348456 is about 433.2944285914.

The spelling of 81348456 in words is "eighty-one million, three hundred forty-eight thousand, four hundred fifty-six".