81354288 has 80 divisors (see below), whose sum is σ = 215673696. Its totient is φ = 26419200.

The previous prime is 81354283. The next prime is 81354307. The reversal of 81354288 is 88245318.

It is not an unprimeable number, because it can be changed into a prime (81354283) 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, 470170 + ... + 470342.

Almost surely, 2^81354288 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 81354288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107836848).

81354288 is an abundant number, since it is smaller than the sum of its proper divisors (134319408).

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

81354288 is a wasteful number, since it uses less digits than its factorization.

81354288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382 (or 376 counting only the distinct ones).

The product of its digits is 61440, while the sum is 39.

The square root of 81354288 is about 9019.6611909761. The cubic root of 81354288 is about 433.3047828659.

The spelling of 81354288 in words is "eighty-one million, three hundred fifty-four thousand, two hundred eighty-eight".