81896096 has 36 divisors (see below), whose sum is σ = 166222602. Its totient is φ = 39689856.

The previous prime is 81896069. The next prime is 81896107. The reversal of 81896096 is 69069818.

It can be written as a sum of positive squares in only one way, i.e., 54228496 + 27667600 = 7364^2 + 5260^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 81896096.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 311261 + ... + 311523.

Almost surely, 2^81896096 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 81896096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83111301).

81896096 is an abundant number, since it is smaller than the sum of its proper divisors (84326506).

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

81896096 is an equidigital number, since it uses as much as digits as its factorization.

81896096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 81896096 is about 9049.6461809288. The cubic root of 81896096 is about 434.2645714216.

The spelling of 81896096 in words is "eighty-one million, eight hundred ninety-six thousand, ninety-six".