81027344 has 40 divisors (see below), whose sum is σ = 164519232. Its totient is φ = 38586240.

The previous prime is 81027313. The next prime is 81027379. The reversal of 81027344 is 44372018.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154667 + ... + 155189.

Almost surely, 2^81027344 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 81027344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82259616).

81027344 is an abundant number, since it is smaller than the sum of its proper divisors (83491888).

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

81027344 is a wasteful number, since it uses less digits than its factorization.

81027344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975 (or 969 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 81027344 is about 9001.5189829273. The cubic root of 81027344 is about 432.7235531112.

The spelling of 81027344 in words is "eighty-one million, twenty-seven thousand, three hundred forty-four".