81468282 has 48 divisors (see below), whose sum is σ = 190261440. Its totient is φ = 23188032.

The previous prime is 81468259. The next prime is 81468287. The reversal of 81468282 is 28286418.

It is a self number, because there is not a number n which added to its sum of digits gives 81468282.

It is not an unprimeable number, because it can be changed into a prime (81468287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142894 + ... + 143462.

It is an arithmetic number, because the mean of its divisors is an integer number (3963780).

Almost surely, 2^81468282 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81468282, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95130720).

81468282 is an abundant number, since it is smaller than the sum of its proper divisors (108793158).

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

81468282 is a wasteful number, since it uses less digits than its factorization.

81468282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075 (or 1068 counting only the distinct ones).

The product of its digits is 49152, while the sum is 39.

The square root of 81468282 is about 9025.9781741371. The cubic root of 81468282 is about 433.5070712932.

It can be divided in two parts, 814 and 68282, that added together give a palindrome (69096).

The spelling of 81468282 in words is "eighty-one million, four hundred sixty-eight thousand, two hundred eighty-two".