81108324 has 96 divisors (see below), whose sum is σ = 233049600. Its totient is φ = 24187680.

The previous prime is 81108289. The next prime is 81108361. The reversal of 81108324 is 42380118.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79087 + ... + 80105.

It is an arithmetic number, because the mean of its divisors is an integer number (2427600).

Almost surely, 2^81108324 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 81108324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116524800).

81108324 is an abundant number, since it is smaller than the sum of its proper divisors (151941276).

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

81108324 is a wasteful number, since it uses less digits than its factorization.

81108324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110 (or 1102 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 81108324 is about 9006.0159893262. The cubic root of 81108324 is about 432.8676620184.

The spelling of 81108324 in words is "eighty-one million, one hundred eight thousand, three hundred twenty-four".