81096928 has 24 divisors (see below), whose sum is σ = 174174840. Its totient is φ = 36862080.

The previous prime is 81096923. The next prime is 81096971. The reversal of 81096928 is 82969018.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81096923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114843 + ... + 115546.

It is an arithmetic number, because the mean of its divisors is an integer number (7257285).

Almost surely, 2^81096928 is an apocalyptic number.

81096928 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

81096928 is an abundant number, since it is smaller than the sum of its proper divisors (93077912).

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

81096928 is a wasteful number, since it uses less digits than its factorization.

81096928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230410 (or 230402 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 81096928 is about 9005.3832789060. The cubic root of 81096928 is about 432.8473879343.

The spelling of 81096928 in words is "eighty-one million, ninety-six thousand, nine hundred twenty-eight".