81084326 has 12 divisors (see below), whose sum is σ = 124583316. Its totient is φ = 39558540.

The previous prime is 81084323. The next prime is 81084331. The reversal of 81084326 is 62348018.

It is a junction number, because it is equal to n+sod(n) for n = 81084292 and 81084301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81084323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 83021 + ... + 83991.

It is an arithmetic number, because the mean of its divisors is an integer number (10381943).

Almost surely, 2^81084326 is an apocalyptic number.

81084326 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

81084326 is a deficient number, since it is larger than the sum of its proper divisors (43498990).

81084326 is an frugal number, since it uses more digits than its factorization.

81084326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1987 (or 1016 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 81084326 is about 9004.6835591263. The cubic root of 81084326 is about 432.8249661013.

The spelling of 81084326 in words is "eighty-one million, eighty-four thousand, three hundred twenty-six".