81083832 has 32 divisors (see below), whose sum is σ = 211524480. Its totient is φ = 25852640.

The previous prime is 81083813. The next prime is 81083833. The reversal of 81083832 is 23838018.

It is a junction number, because it is equal to n+sod(n) for n = 81083793 and 81083802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81083833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72894 + ... + 73997.

It is an arithmetic number, because the mean of its divisors is an integer number (6610140).

Almost surely, 2^81083832 is an apocalyptic number.

It is an amenable number.

81083832 is an abundant number, since it is smaller than the sum of its proper divisors (130440648).

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

81083832 is a wasteful number, since it uses less digits than its factorization.

81083832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146923 (or 146919 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 81083832 is about 9004.6561289146. The cubic root of 81083832 is about 432.8240871152.

The spelling of 81083832 in words is "eighty-one million, eighty-three thousand, eight hundred thirty-two".