81416032 has 24 divisors (see below), whose sum is σ = 163701216. Its totient is φ = 39841152.

The previous prime is 81416011. The next prime is 81416039. The reversal of 81416032 is 23061418.

It is a junction number, because it is equal to n+sod(n) for n = 81415988 and 81416006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81416039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25563 + ... + 28570.

It is an arithmetic number, because the mean of its divisors is an integer number (6820884).

Almost surely, 2^81416032 is an apocalyptic number.

It is an amenable number.

81416032 is an abundant number, since it is smaller than the sum of its proper divisors (82285184).

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

81416032 is a wasteful number, since it uses less digits than its factorization.

81416032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54190 (or 54182 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 81416032 is about 9023.0832867707. The cubic root of 81416032 is about 433.4143743236.

The spelling of 81416032 in words is "eighty-one million, four hundred sixteen thousand, thirty-two".