81338346 has 24 divisors (see below), whose sum is σ = 178216740. Its totient is φ = 26807616.

The previous prime is 81338339. The next prime is 81338363. The reversal of 81338346 is 64383318.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 81270225 + 68121 = 9015^2 + 261^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 81338346.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23785 + ... + 26988.

Almost surely, 2^81338346 is an apocalyptic number.

81338346 is an abundant number, since it is smaller than the sum of its proper divisors (96878394).

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

81338346 is a wasteful number, since it uses less digits than its factorization.

81338346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50870 (or 50867 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 81338346 is about 9018.7774116008. Note that the first 3 decimals coincide. The cubic root of 81338346 is about 433.2764778792.

The spelling of 81338346 in words is "eighty-one million, three hundred thirty-eight thousand, three hundred forty-six".