81036828 has 48 divisors (see below), whose sum is σ = 215231520. Its totient is φ = 26352000.

The previous prime is 81036827. The next prime is 81036829. The reversal of 81036828 is 82863018.

81036828 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (81036827) and next prime (81036829).

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

81036828 is strictly pandigital in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 81036792 and 81036801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81036827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4723 + ... + 13578.

It is an arithmetic number, because the mean of its divisors is an integer number (4483990).

Almost surely, 2^81036828 is an apocalyptic number.

It is an amenable number.

81036828 is an abundant number, since it is smaller than the sum of its proper divisors (134194692).

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

81036828 is a wasteful number, since it uses less digits than its factorization.

81036828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18355 (or 18347 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 81036828 is about 9002.0457674909. The cubic root of 81036828 is about 432.7404354370.

The spelling of 81036828 in words is "eighty-one million, thirty-six thousand, eight hundred twenty-eight".