81026330 has 32 divisors (see below), whose sum is σ = 181837440. Its totient is φ = 25254720.

The previous prime is 81026329. The next prime is 81026333. The reversal of 81026330 is 3362018.

It is a junction number, because it is equal to n+sod(n) for n = 81026296 and 81026305.

It is not an unprimeable number, because it can be changed into a prime (81026333) 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, 51845 + ... + 53384.

It is an arithmetic number, because the mean of its divisors is an integer number (5682420).

Almost surely, 2^81026330 is an apocalyptic number.

81026330 is an abundant number, since it is smaller than the sum of its proper divisors (100811110).

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

81026330 is a wasteful number, since it uses less digits than its factorization.

81026330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105254.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 81026330 is about 9001.4626589238. The cubic root of 81026330 is about 432.7217480271.

Adding to 81026330 its reverse (3362018), we get a palindrome (84388348).

The spelling of 81026330 in words is "eighty-one million, twenty-six thousand, three hundred thirty".