81096732 has 36 divisors (see below), whose sum is σ = 217054656. Its totient is φ = 25441920.

The previous prime is 81096721. The next prime is 81096737. The reversal of 81096732 is 23769018.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81096737) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65644 + ... + 66867.

It is an arithmetic number, because the mean of its divisors is an integer number (6029296).

Almost surely, 2^81096732 is an apocalyptic number.

It is an amenable number.

81096732 is an abundant number, since it is smaller than the sum of its proper divisors (135957924).

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

81096732 is a wasteful number, since it uses less digits than its factorization.

81096732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132538 (or 132533 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 81096732 is about 9005.3723965198. The cubic root of 81096732 is about 432.8470392234.

It can be divided in two parts, 8109 and 6732, that added together give a palindrome (14841).

The spelling of 81096732 in words is "eighty-one million, ninety-six thousand, seven hundred thirty-two".