81362344 has 64 divisors (see below), whose sum is σ = 180000000. Its totient is φ = 34461504.

The previous prime is 81362341. The next prime is 81362353. The reversal of 81362344 is 44326318.

It is not an unprimeable number, because it can be changed into a prime (81362341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 408757 + ... + 408955.

It is an arithmetic number, because the mean of its divisors is an integer number (2812500).

Almost surely, 2^81362344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81362344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90000000).

81362344 is an abundant number, since it is smaller than the sum of its proper divisors (98637656).

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

81362344 is a wasteful number, since it uses less digits than its factorization.

81362344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375 (or 357 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 81362344 is about 9020.1077598885. The cubic root of 81362344 is about 433.3190848701.

The spelling of 81362344 in words is "eighty-one million, three hundred sixty-two thousand, three hundred forty-four".