81082736 has 40 divisors (see below), whose sum is σ = 179985504. Its totient is φ = 34663680.

The previous prime is 81082723. The next prime is 81082759. The reversal of 81082736 is 63728018.

It is a junction number, because it is equal to n+sod(n) for n = 81082696 and 81082705.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 68066 + ... + 69246.

Almost surely, 2^81082736 is an apocalyptic number.

It is an amenable number.

81082736 is an abundant number, since it is smaller than the sum of its proper divisors (98902768).

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

81082736 is a wasteful number, since it uses less digits than its factorization.

81082736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809 (or 1803 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 81082736 is about 9004.5952713045. The cubic root of 81082736 is about 432.8221369635.

It can be divided in two parts, 81082 and 736, that added together give a palindrome (81818).

The spelling of 81082736 in words is "eighty-one million, eighty-two thousand, seven hundred thirty-six".