81000096 has 48 divisors (see below), whose sum is σ = 213754464. Its totient is φ = 26856704.

The previous prime is 81000083. The next prime is 81000107. The reversal of 81000096 is 69000018.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×81000096² = 13122031104018432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 16771 + ... + 21053.

It is an arithmetic number, because the mean of its divisors is an integer number (4453218).

Almost surely, 2^81000096 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 81000096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106877232).

81000096 is an abundant number, since it is smaller than the sum of its proper divisors (132754368).

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

81000096 is a wasteful number, since it uses less digits than its factorization.

81000096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4493 (or 4485 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 81000096 is about 9000.0053333318. The cubic root of 81000096 is about 432.6750420254.

The spelling of 81000096 in words is "eighty-one million, ninety-six", and thus it is an aban number and an uban number.